20GR105066R / PHILIPS [TV]

• Search jumps on UHF.
• White balance adjustment. (20GR105066R tips)
• Interference in audio. Interference in picture. (+ extract of circuit diagram)
• Field collapse normally with blank picture. (picture attached)
• Dead. Low level buzz from loudspeaker. (picture attached)
• Horizontal oscillator adjustment procedure.
• No colour. (+ extract of circuit diagram) (20GR105066R tips)
• Fizzling sound from speakers at start-up and intermittently picture jagged.
• Loud chriping after switch on. It becomes lower after a short time.
• Turns on automatically. No RC or front panel controls.
• Buzz in audio (intermittently). (picture attached)
• The remote control only controls the volume and sound-stop. No function with On-Off and channel change-over, although the display for the operation flickers.
• Green picture. after warm-up. Lines in picture. after warm-up. Does not change channels.
• Tuning menu can not be called. All other functions OK.
• How to switch off Hotel-Mode.
• No function at switch on from standby. Switches to LOCK (hotel) mode. (picture attached)
• No functions. Hum in loudspeaker. No LED lit.
• No picture (when cold).
• No voltage from PSU, computer does not work. (picture attached)
• Menu rolling. (part of circuit diagram displayed)
• No line output.
• No picture. No sound. Switching on and off from Standby OK.
• No picture. No sound. Purring sound in loudspeaker. (picture attached)
• Tuning drift, when it is hot the tuning is lost on channel change.
• Modification at line transformer position 5530. (part of circuit diagram displayed)
• Memory cannot be opened via "rhombus". Stored channels cannot be changed.
• Tuning drifts. (picture attached) (20GR105066R tip from PHILIPS)
• Replacement of surface mounted diode 6637. (+ extract of circuit diagram)
• Control micro processors.
• Sound motorboating when cold. (+ extract of circuit diagram)
• Spurious nonsense OSG. Goes to standby after 0.5-2hrs. Loss of tuning.
• Initial volume level is higher than maximum Hotel mode setting.
• Green picture. (extract of circuit diagram attached)
• Change of C2523.
• Automatic fine tuning (AFT) field alignment procedure.
• The tone (sound) tunes well, but the volume cannot be raised.
• The removal of leaded diodes. (picture attached)
• Programme tuning difficulty. Stations has shifted on tuning bar. (service info for PHILIPS -20GR105066R)
• No transmitters to adjust and the sound is not controllable.
• Set goes accidentally into hotel mode.
• No colour.
• Unstable tuning.
• Buzzing from PSU. when cold. (picture attached)
• No tuning. Impossible to change analog control adjustments (brightness, sound, etc.). (picture attached)
• No tuning bar when install button pressed and set not in hotel mode. (extract of circuit diagram attached)
• Tripping. (extract of circuit diagram attached)
• Whistle.
• Line output transistor fails repeatedly. (+ extract of circuit diagram)
• Horizontal hold adjustment procedure.
• No tuning. only on certain channels.
• Appliance can not be programmed. Search does not function. Only limited volume control. (PHILIPS - 20GR105066R information)
• Change of C2523.
• Dead. Low hum.
• SIF DET adjustment procedure.
• No colour.
• How to switch OFF Hotel-Mode.
• Lines on picture after approx one hour. It consists of a band of bright white lines about two inches wide. (part of circuit diagram displayed)
• How to reset microprocessor.
• Sometimes when turned on, green screen only with flyback lines, at other times no tuning and channel will not change. (extract of circuit diagram attached)
• Failures in the power supply. (with circuit diagram extract)
• Dark picture.
• Line tearing. on lower half screen. (picture attached)
• No sound or raster. The 95V HT supply is present at the line output stage but there is no line drive. (+ extract of circuit diagram)
• Standby just pulsing.
• No +9V, line output stage is OK. (+ extract of circuit diagram)
• Blank raster. No audio. after a while. (picture attached)
• Whistling from PSU. (picture attached)
• Line down middle of screen. (+ extract of circuit diagram)
• Dead. Power LED is OFF (ON in standby). Hissing from PSU.
• Picture fails for a short time. (extract of circuit diagram attached)
• Green picture.
• Sound goes to max. intermittently and HT varies. (extract of circuit diagram attached)
• Change of C2523.
• No tuning, no remote volume control. (+ extract of circuit diagram)
• Green screen with flyback lines. Green oscillations. Noise as if HV leaky on picture tube base. (+ extract of circuit diagram)
• Initial volume level is higher than maximum Hotel mode setting. (service info for PHILIPS -20GR105066R)
• Picture displays lines and strange foldover effect at centre.
• Service manual correction. (picture attached)
• Does not shut down (when cold).
• Error messages indicated by front display flashing. (with circuit diagram extract)
• Rolling or jittering picture. (+ extract of circuit diagram)
• Slight foldover at upper part of picture if appliance is switched on when cold. Fault disappears after few minutes. (with circuit diagram extract)
• Power supply fault finding. (extract of circuit diagram attached)
• Difficult startup. Rattling sound from line output trafo.
• +B very high. (part of circuit diagram displayed) (PHILIPS - 20GR105066R information)
• Standby LED lights up and switches off at power on. Appliance will not start up. (20GR105066R tip from PHILIPS)
• No start up from cold and humming.
• Sound varies with picture content.
• The switched-mode power supply cannot be loaded.
• Colours flicker and disappears.
• Vertical roll. (with circuit diagram extract)
• Picture is poor with rippling on verticals. (picture attached)
• No tuning.
• Picture centering has shifted horizontally. No OSD.
• LED flashes once, then gurgles. (part of circuit diagram displayed)
• Stored channels are partially lost.
• Line tearing, especially with bright scences. (picture attached)
• No function. Standby-LED lights up. Appliance switches on but no picture or sound.
• Distorted audio.
• V-centre adjustment procedure.
• No switch on after activating mains switch. Whistling noise. (extract of circuit diagram attached)
• Microprocessor screening plate. (extract of circuit diagram attached)
• Error codes.
• No audio.
• Intermittent channel drift in UHF. Channel search OK. VHF OK.
• No horizontal synchronisation. (part of circuit diagram displayed)
• No functions. after start-up (intermittently).
• Colour disappears with VCR-scan (picture search). (+ extract of circuit diagram)
• Power supply does not oscillate. (extract of circuit diagram attached)
• No colour and vertical black bar across screen.
• Slow hiccup (extract of circuit diagram attached)
• Line chirps intermittently. Appliance does not start. Only hum from loudspeakers.
• No picture. OSD OK .
• Hotel mode.
• Enter service mode.
• Tuning drifts. only on certain channels.
• Excessive green. (20GR105066R tip from PHILIPS)
• Green picture.
• Dead set. Tries to start.
• Settings do not stay in position. (PHILIPS - 20GR105066R information)
• No audio.
• No functions. Standby LED flashes. Relay switches to ON.
• Poor sync. AGC fault.
• Intermittent colour.
• No picture, sound ok but on turning up A1 control, frame collapse. (picture attached)
• Protection device (thyristor THY6641) is triggered at switch on. (picture attached) (service info for PHILIPS -20GR105066R)
• To improve performance with prerecorded cassettes. (+ extract of circuit diagram)
• LED does not flash. Slight buzz in appliance. (picture attached) (20GR105066R tip from PHILIPS)
• Colours flickers and disappears.
• No sound or picture. Low hum from speaker. (part of circuit diagram displayed)
• No start-up. Buzzing from speakers and working noise of PSU.
• White screen with flyback lines. Excessive brightness which increases until PSU switches to protection mode. (with circuit diagram extract)
• Correction to service manual LOT winding.
• No start-up. intermittently (when cold). (picture attached)
• Trips. at start-up (intermittently). (+ extract of circuit diagram)
• Set does not retune or program etc
• New IR receiver.
• Line output stage only starts up for a short time. (picture attached)
• Microcomputers and screening plate.
• Poor synchronisation. (part of circuit diagram displayed)
• How to switch off Hotel-Mode:
• Picture shifts. (with circuit diagram extract)
• No start up. No standby. Attempts to start up, but fails.
• How to de-activate Hotel mode.
• The fuse and the bridge diodes in the power supply blow.
• Drive for high voltage missing. (picture attached)
• Strongly distorted sound by low volume.
• Whistling.
• Tuning procedure.
• Set comes on in store lock mode. (+ extract of circuit diagram)
• Initial volume level is higher than maximum hotel mode setting. (service info for PHILIPS -20GR105066R)
• CRT types.
• Colour sync adjustment procedure.
• No tuning or on screen tuning display.
• Dead. Only standby-LED works. Responds to TURN ON command, but no image and no sound.
• Picture passes out in the centre.
• Line out of phase. Black band in centre of screen. No colour. (PHILIPS - 20GR105066R information)
• Blown chopper. (+ extract of circuit diagram)
• No start-up. intermittently.
• The following production changes were introduced to prevent the set coming on in the store lock mode when switched on from standby. (part of circuit diagram displayed)
• Blank raster. OSD OK .
• No audio.
• 10V on 95V line. (with circuit diagram extract)
• Buzzing sound then switches off.
• Intermittently dead. (picture attached)
• High voltage transistor defective after a while.
• No frame or short frame. (part of circuit diagram displayed)
• Dim picture with Hanover bars.
• Skips channels during tuning. only on certain channels.
• Connection of a loop system to the TV.
• Enable Hotel mode.
• No vertical deflection. (extract of circuit diagram attached)
• No picture. Audio OK .
• No voltage from PSU. (picture attached)
• Stuck in hotel mode.
• Right hand side of screen has a line.
• Slow start up of power supply. (extract of circuit diagram attached)
• No functions. when cold.
• No HT from chopper circuit. (picture attached)
• Reduced horizontal size. (part of circuit diagram displayed)
• Sound returns gradually after channel change. (extract of circuit diagram attached)
• Excessive brightness.
• Unable to tune or set volume in Prefix mode.
• No or intermittent start-up. (+ extract of circuit diagram)
• Programs and PP-settings cannot be changed.
• The TV cannot hold the picture.
• To remove store/lock.
• Line output transistor running hot. (extract of circuit diagram attached)
• Unstable tuning. (20GR105066R PHILIPS repair tip)
• No colour in OSD.
• Poor reproduction of copy protected tapes. (+ extract of circuit diagram)
• No tuning possible, F2 appears on bottom of picture and S1 on top.
• Frame has shifted sideways. Appliance whistles and does not oscillate correctly. (+ extract of circuit diagram)
• Modification introduced to +9V supply. (service info for PHILIPS -20GR105066R)
• No freeze frame or intermittent freeze frame; no sound. (extract of circuit diagram attached)
• Green raster. Faint picture. Flyback lines.
• No OSD. Picture OK . (20GR105066R PHILIPS repair tip)
• Production change to line drive. (with circuit diagram extract)
• Intermittent colour and intermittent dark vertical bar on picture.
• Print with linearity coil pos. 5800.
• Line tearing and rope effect.
• PSU switches off with load at U95V. (extract of circuit diagram attached)
• Change of C2523.
• Crackling and popping in sound after a short time.
• Red picture. Flyback lines.
• Dead when switched on via mains switch. Though appliance is on, red LED flashes. Can be switched over to standby. If left in standby for 1 hour and then switched on via RC, functions.
• Set won't tune to high frequency channels and lower frequency channels appear to be higher. (extract of circuit diagram attached)
• Identification coil adjustment.
• Stored channels drift off tune briefly after switch on. Crackle in sound. (PHILIPS - 20GR105066R information)
• Dead. Low frequency noise on sound.
• Low audio. (picture attached)
• No HV.
• Blank raster. Flyback lines. (part of circuit diagram displayed)
• Picture is mostly green with flyback lines after 10 secs from switch on.
• Does not start up at once from cold.
• No power with abnormal sound. (picture attached)
• No line start up; +95 available; +9V is about 4.5V. (extract of circuit diagram attached)
• No regulation. (with circuit diagram extract)
• To put into hotel mode.
• Sound varies with picture content.
• No functions. Sound buzzes in loudspeaker. (with circuit diagram extract)
• Control panel cover.
• Change of C2523.
• Picture shifted to the right. (with circuit diagram extract)
• Tuning drifts. only on certain channels (after a while).
• After working normally for a while the TV blocks in any position. The functions do not work.
• Picture appears slowly.
• No start-up. when cold. (part of circuit diagram displayed) (service info for PHILIPS -20GR105066R)
• After operating for one hour it is no longer possible to switch over programmes not even from the front panel. Appliance must be switched on and off then it is possible to change channels. (20GR105066R tip from PHILIPS)
• No start up, just a buzzing noise in speakers. (extract of circuit diagram attached)
• After replacement of the line output transistor BUT12, picture with trapezoid effect, BUT12 overheats and goes defective again. (+ extract of circuit diagram)
• No function, starts up from standby, then goes out.
• No standby, humming and standby LED blinks.
• Hazy flickering picture at top. (part of circuit diagram displayed)
• Stops at start up. (part of circuit diagram displayed)
• Programme tuning difficulty, stations shifted on tuning bar. (+ extract of circuit diagram) (service info for PHILIPS -20GR105066R)
• U743 tuner replacement. (extract of circuit diagram attached)
• Noise in sound. Mute does not function.
• Adjustment of +95V. (extract of circuit diagram attached)
• No functions. Slow start-up. (part of circuit diagram displayed)
• PSU peeps +95 is ca 0,8v
• No audio.
• No start-up. (part of circuit diagram displayed) (20GR105066R tips)
• Volume varies. depending on picture content. (+ extract of circuit diagram)
• 6613 type change. (+ extract of circuit diagram)
• Vertical size varies. intermittently.
• Chopper inoperative. (extract of circuit diagram attached)
• Green screen with flyback line. No picture. OSD OK.
• Does not regulate +95V.
• The TV does not stop during the tuning phase. (20GR105066R tips)
• Switches off by itself. after a while. (with circuit diagram extract)
• PAL colour amplitude adjustment procedure.
• Horizontal white line.
• Dead. At switch on the stand by LED flashes.
• Defective purity.
• Very slight vertical foldover with interferences similar to EHT arcing, especially on very white scenes. (20GR105066R tip from PHILIPS)
• No connection for headphone.
• Line output transistor becomes warm and in the course of time it becomes defective. (extract of circuit diagram attached)
• During picture changes sometimes a volume increase (plop) is heard. (extract of circuit diagram attached)
• Buzz in audio. No picture. (service info for PHILIPS -20GR105066R)
• No picture. (part of circuit diagram displayed)
• Dim picture with Hanover bars visible. (part of circuit diagram displayed)
• Intermittent colour. (PHILIPS - 20GR105066R information)
• Will not tune, drifts, colour disappears or interference on a certain channel. (e.g. channel 5 and 59) (20GR105066R tip from PHILIPS)
• Difficult to tune programmes, stations shifted on tuning bar. (20GR105066R PHILIPS repair tip)
• Dead, very slight whistle from PSU.
• Vertical amplitude cannot be fully adjusted, TXT lines can be seen. (with circuit diagram extract) (20GR105066R tip from PHILIPS)
• R-Y and B-Y discriminator adjustment procedure. (+ extract of circuit diagram)
• No picture or sound but RCU works correctly. LED flashes when the handset is tried. (with circuit diagram extract)
• Intermittent colour.
• Focus adjustment.
• No power supply start up in loaded condition (eg. with lamp).
• Hums softly. (with circuit diagram extract)
• Enable Hotel mode. Disable hotel mode.
• Skips channels during tuning. (picture attached)
• "Store" key does not work. (with circuit diagram extract)
• Low audio.
• Reluctant to start up from cold.
• Secondary main power supply OK except +9V at 5.8V
• Search jumps on UHF. (20GR105066R PHILIPS repair tip)
• Vertical collapse. (+ extract of circuit diagram)
• No line output stage. (picture attached)
• Store lock on the appliance.
• PSU does not start up, if appliance was switched off for a day. Appliance functions after short switch on/off. (part of circuit diagram displayed)
• Appliance does not function with standby light flashing.
• No picture. TXT OK . (picture attached)
• SOPS defective. (with circuit diagram extract)
• Low frequency noise on sound.
• Does not start. Slight buzzing in loudspeaker.
• Using a lamp as a load.
• Stations won't change. Picture and sound OK. Other functions OK.
• Low 5V to micro chip. (part of circuit diagram displayed)
• Programme channel search cannot be called up.
• Bright flash on screen and no picture or sound after a few minutes. (with circuit diagram extract)
• Field foldover at switch on from cold. Effect disappears when appliance warms up. (with circuit diagram extract) (20GR105066R tips)
• No channel search. No OSD. (part of circuit diagram displayed)
• No sound. Picture OK. After a short time TV stops. High frequency noise from PSU. (picture attached)
• Only some programs with snowy picture can be tuned and on band 1 missing some programs. (with circuit diagram extract) (20GR105066R PHILIPS repair tip)
• No picture. No audio. (part of circuit diagram displayed)
• Dead. (part of circuit diagram displayed) (20GR105066R tip from PHILIPS)
• Intermittently dead. after start-up.
• Lines across top of picture about 8" in first 100 lines. (+ extract of circuit diagram)
• Memory content dropout at positions 4 and 5.
• Green picture after few hours, intermittently fault disappears for short while when switching from a station to another. Strange characters in OSD.
• No sound. No picture. Faint motorboating noise.
• Stuck in standby. (+ extract of circuit diagram)
• PSU check. (20GR105066R PHILIPS repair tip)
• How to de-activate Hotel-Mode:
• Excessive vertical size.
• No switch on. Low noise on sound. (picture attached) (20GR105066R tip from PHILIPS)
• Unable to retune set or set analogue levels. Store-lock option may be on "Hotel mode".
• Dead with whistling noise coming from power supply. (extract of circuit diagram attached)
• Intermittently narrow picture, but corrects itself shortly after.
• No output from the chopper power supply which uses a junction FET, whose gate and source are at 12V while 300V is present at the drain. (+ extract of circuit diagram)
• Delay RF AGC adjustment procedure.
• Poor sound, cannot be adjusted louder. When adjusting, sound cuts out. (part of circuit diagram displayed)
• New infra red receiver.
• No operation.
• Does not switch on, standby LED OK.
• Blank or green raster. Flyback lines. Faint picture or normal picture. (picture attached)
• Line output stage does not start up. (extract of circuit diagram attached)
• No audio.
• Limited volume. No channel search.
• Sound varies with picture content.
• Does not switch on. LED is lit in standby. If appliance is switched on with RC, LED switches off.
• Replacement of TDA7052 with a TDA7052A.
• No function. When switching on with RC, standby LED lights up. (extract of circuit diagram attached)
• White unmodulated raster. Picture missing. (extract of circuit diagram attached)
• No colour.
• Colour flickers. No colour. after a while. (picture attached)
• Replacing the EAROM. (+ extract of circuit diagram)
• Buzzing.
• Wavy picture. on the right.
• Green picture with retrace lines. After a few restarts picture OK.
• How to enter/exit HOTEL mode.
• Line output stage TS7528 is defective. (picture attached) (20GR105066R tips)
• Unstable tuning.
• Humming, motor noise and other unusual noises. Normal picture.
• 95V available. 9V is only 5.2V. Slight buzzing from loudspeakers.
• Blue picture. Coloured lines.
• Colours flickers and disappears.
• Unregulated power supply. Pulsating picture and surging sound. (+ extract of circuit diagram)
• Bright flash on screen. No picture or sound. (part of circuit diagram displayed)
• Display goes to F1 a few seconds after switching the set on.
• No tuning - no channels.
• Trips. (part of circuit diagram displayed)
• Difficultly in tuning to correct position.
• Right side of picture discoloured.
• Line output stage does not function. (20GR105066R tip from PHILIPS)
• Two lines going around. (picture attached)
• No start-up. Standby LED flashes .
• Squealing from PSU. (20GR105066R PHILIPS repair tip)
• Local controls inoperative.
• No audio.
• Random breakdown of line output transistor. (extract of circuit diagram attached) (20GR105066R tip from PHILIPS)
• Picture separating line appears. Whistling.
• Smeary, washed out picture with bent verticals. (extract of circuit diagram attached)
• To release hotel mode (child lock).
• Appliance will not switch on at times, but hums in the power supply section.
• Defective IC7103 SV-production. (extract of circuit diagram attached)
• Search jumps on UHF.
• Occasionally appliance does not switch on from standby. No further functions are possible.
• How to de-activate Hotel-Mode.
• No audio.
• Won't tune a new channel. Won't activate store function. Picture OK. Sound OK.
• Set dead with just 5V on the 95V line. Standby LED is on but set won't start. (+ extract of circuit diagram)
• Doesn't store stations correctly.
• Does not start up. Light buzz from loudspeaker. Standby LED produces one brief blink.
• Picture shifted horizontally. (part of circuit diagram displayed)
• Does not stop on stations. (20GR105066R tip from PHILIPS)
• Line transistor 7528 blows within 1 sec. (picture attached)
• Line output transistor replacement.
• Bell filter adjustment procedure.
• No function. Motorboating from PSU. TV starts up randomly. Intermittent fault.
• Noise in audio.
• Only half a picture. (with circuit diagram extract)
• Cannot change tuning or stored settings. (with circuit diagram extract)
• Hotel Mode activates by itself. (with circuit diagram extract)
• Intermittently no picture and sound at switch on. Buzz from speaker. (with circuit diagram extract)
• Dead. Only hum from speakers. (with circuit diagram extract)
• Streaks in picture. Picture pulls and rolls intermittently.
• Green screen and at other times no tuning. (extract of circuit diagram attached)
• Memory loss. (part of circuit diagram displayed)
• After switching on the CTV "EXT...1.2.3..." appears on the screen.
• Cannot be programmed and search does not function. Only limited volume adjustable.
• Initial volume level is higher than maximum Hotel mode setting.
• Vertical vibration in cold condition of set.
• Dead. Strange noises from PSU/ line output transformer. (with circuit diagram extract)
• Colour amplitude and phase adjustment procedure.
• Doesn't tune stations correctly. When cold, crossed lines on low UHF channels. (+ extract of circuit diagram)
• Reluctant to start from cold (extract of circuit diagram attached)
• Reduced vertical size. at top.
• Vertical line. on the right half screen. (+ extract of circuit diagram)
• How to de-activate volume limiter.
• Excessive horizontal size. (PHILIPS - 20GR105066R information)
• No tuning. (picture attached)
• Volume goes to max. No volume control.
• Bright picture. Flyback lines.
• No functions, hum in loudspeakers. (+ extract of circuit diagram)
• Volume can't be tuned down. No tuning with RC. (picture attached)
• No switch on. Weak whistling noise from PSU. LED is OFF.
• Intermittent green picture, channels cannot be programmed. (with circuit diagram extract)
• Vertical oscillator adjustment procedure.
• Searches for channels continuously. (extract of circuit diagram attached)
• Dark picture. Audio OK .
• Picture shifted to the left. intermittently. Line tearing. intermittently. (picture attached)
• Slow start-up. (PHILIPS - 20GR105066R information)
• LED switches on then off immediately. (20GR105066R tips)
• Sound increases intermittently or "pops", especially during bright scenes. (extract of circuit diagram attached)
• Appliance is dead with standby LED flashing after a few seconds. (+ extract of circuit diagram)
• Programming unoperational. Limited sound adjustment possible.
• Sound varies with picture content.
• Description of SMPS. (extract of circuit diagram attached)
• +9V supply modification. (picture attached)
• No tuning. No channel lock. (with circuit diagram extract)
• Dead due to action of over voltage protection circuit.
• Loosing colour during play-back of a video tape. (picture attached)
• When switching on, only a 10cm stripe on top of screen, the rest of screen is black with flyback lines. After a while, stripe becomes wider. (extract of circuit diagram attached)
• Intermittent audio and picture. (picture attached)
• Initial volume level is higher than maximum Hotel mode setting.
• No picture and sound. Low hum intermittently, no function.
• Appliance hums slightly (no speaker) horizontal end stage and power supply transistor are ok. Unfortunately no service instructions available.
• No function. Standby LED flashes briefly. (with circuit diagram extract) (20GR105066R tip from PHILIPS)
• Unstable tuning. (20GR105066R tips)
• Excessive HV. after a while.
• Volume change with great fluctuations in brightness. (extract of circuit diagram attached)
• Comes on for a short time.
• Quick hiccup. (+ extract of circuit diagram)
• Picture is faint with hanover bars. (+ extract of circuit diagram)
• Intermittent destruction of line o/p transistor. (with circuit diagram extract)
• Switches to standby. (with circuit diagram extract)
• Poor synchronisation. when cold. (part of circuit diagram displayed)
• Processor numbers (changed).
• No SOP supply. (part of circuit diagram displayed)
• Stops working every 2 or 3 hrs. Only starts again after switching off and on again.
• Height excessive. Defective linearity. Field blanking. (part of circuit diagram displayed)
• Picture only in two bars in upper screen section, the rest is dark. (with circuit diagram extract)
• Becomes defective immediately after switch on.
• Comes on in standby. When program button pressed standby lamp blinks then goes off. (20GR105066R PHILIPS repair tip)
• Line output transistor TR7528 fails at switch on.