21B4T04NTX / SANG [TV]

• Black screen.
• Dark screen. Audio OK .
• Horizontal dark lines in centre of screen.
• Horizontal line. (21B4T04NTX tips)
• Picture remain visible in standby, but without colours, contrast, or brightness.
• Black streak in lower part and half a picture in upper part of the screen.
• Crackling noise. (service info for SANG -21B4T04NTX)
• IC304 (TDA7263M) fails repeatedly.
• No colour; lines; jumping - worse on bright scenes.
• Weak contrast.
• Cracking noise 4-5 times when switched on.
• Distorted audio from central speaker.
• Flyback lines. intermittently.
• No channels. No picture, only snow.
• Comes on for a short time. Switches to standby.
• No picture.
• No signal. No picture, only snow.
• Short non-linear frame (may improve as set warms up).
• No functions. (service info for SANG -21B4T04NTX)
• Basic features.
• No picture, only high tension.
• Blank raster. Audio and OSD OK .
• Flyback transformer slightly chirps.
• Switches off by itself. at high volume.
• No start-up.
• Trips when switched on.
• Screen adjustments.
• No reception.
• No RC functions.
• Arcing effect on high brightness.
• Vertical fault. at top.
• LED lights, no function.
• Yellow picture.
• Wow in audio.
• Enter service mode. (21B4T04NTX tip from SANG)
• Noise in audio (intermittently).
• No picture. OSD OK .
• White balance adjustment.
• Only starts on remote.
• No colour.
• Slow start-up. in standby. (21B4T04NTX SANG repair tip)
• RC code HQ.
• Distorted audio (only on certain channels).
• No E/W correction. (21B4T04NTX tip from SANG)
• No picture. Audio OK . No HV.
• Retrace lines. Excessive brightness.
• White screen. Flyback lines.
• Dim picture. (SANG - 21B4T04NTX information)
• Brightness varies.
• Does not switch to standby.
• No EE or PB picture.
• Dead. after lightning strike.
• No colour. Reduced vertical size.
• No horizontal synchronisation.
• Line output transistor (2SD1541) has blown.
• No front control operation or LED. Snowy raster. No tuning.
• Snowy picture, no channel LEDS and no volume.
• Intermittent colour. after warm-up.
• Horizontal output transistor fails repeatedly.
• No picture. Audio OK .
• Flyback lines.
• No functions with RC, only the internet functions.
• Defective menu, no OSD.
• Distorted audio. at high volume.
• R528 (10K) and C524 (220nF) keeps failing.
• Flyback transformer is defective. (21B4T04NTX SANG repair tip)
• Dark and bright streaking to the right in the picture, also during AV mode and menu displays.
• Skips channels during tuning.
• Blank raster.
• No start-up (intermittently).
• Stuck in standby.
• HV falshover at line transformer.
• Supply voltage adjustment. (part of circuit diagram displayed)
• Picture jitters at the top and bottom and lines after 30 mins.
• Excessive vertical size.
• Dead.
• Two bright lines approx 0,40 inches at lower and upper part of screen.
• OSD shifts or wrong colours when changing channels with RC.
• No function. Standby is not lit.
• Picture darkens then goes back to normal.
• No line oscillation.
• TV stuck on standard BG or DK. Cannot switch to L.
• Intermittently no colour, field foldover and loss of horizontal shift.
• AGC adjustment. (+ extract of circuit diagram)
• Intermittent low gain.
• Horizontal lines at top 3-4 inches.
• PSU defective.
• No start-up. Relay clicks . (SANG - 21B4T04NTX information)
• Geometry adjustment.
• No colour. Snow in picture. (SANG - 21B4T04NTX information)
• Vertical collapse. (service info for SANG -21B4T04NTX)
• Does not shut down.
• Coloured lines. at top.
• Blank raster. No audio. (21B4T04NTX tips)
• Poor picture. Low contrast.
• No function, goes to standby, red LED is on. Does not start up with RC.
• Hum bar.
• Linearity coil humming.
• Picture size increases and decreases.
• HT does not function.
• No TXT.
• Noise or click from PSU. No start-up.