LC404 TV Repair: Common Faults and Solutions.
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Results: 21
Results: 21
LC404 Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| TOSHIBA | LC404 | No picture, with sound. | SMD 125V/7A (F102) Open and CI 4614B (Q310) | replace CI and replace fuse, Note. (Redo the weld of all jumpers OOO resistor of the plate), including those that marked heating under the plate, as they are the causes of CI burn with cold welding increasing the tension over the CI. | Wortec |
| SEMP | LC4046 FDA | Bloo-b-on-bound binds and obeys nothing LEDs in the main red and yellow PCI lit, | EPROM FAILURE | replace Eprom | jorge- ivoti |
| SEMP | LC4046 | No image appears, just the stand by LED lights up | Large electrolytic capacitor from the power supply fully open, just change it and it worked | reginaldo moronte,eletronica junior caldas novas | |
| TOSHIBA | LC4046FDA | TV turns on stand by and starts but doesn't work, no image and no sound | Short on the +5 v line, seletronic short. | Eduardo | |
| SEMP | LC4046FDA | Burned one of q310,311,or 312 | My tip is to swap all 3! | Rodrigo cofferi | Rodrigo cofferi |
| SEMP | LC4046FDA | Does not turn on backlight, has sound but no backlight | Defective inverter board on ci 4614b (position q310), as per tip sound on Bertinetti's forum | Replaced ci (q310) and fuse (f102) | Claudio Jorge Eckert Junior |
| SEMP TOSHIBA | LC4046FDA 919974G008AA008373 | Turns on stand by normally. When activating power, the TV turns on, just blinks and the image disappears, but the sound remains normal | Testing all the device's boards and everything was normal. I opened the backlight and only one bulb was working normally | Replace all the light bulbs and run to the hug | Eletrotécnica São Rafael |
| SEMP | LC4046FDA | The TV turns on and has sound, lights come on but no image. | Short t plate com. | Shorted or leaking smd capacitors, c11 and c12 t board with. | RNSPTEC |
| SEMP TOSHIBA | LC4045 LC4045F | TV turns on without backlight. At first I thought it was an inverter board | Burnt out bulb causing backlight protection | Changing the lamps | Stefanon |
| SEMP | LC4046FDA | It doesn't turn on anything or stand by. inoperative. | F901 open, qw901 and qw902 shorted. | Qw 901 and qw 902 are f13nk50z / I put ( p14nk50zfp ) in place and it was great. save * ( rma tips )* subscribe tsound and leave your like. | Romulo rma dicas |
| SEMP TOSHIBA | LC4046FDA | Without image, with sound. | I identified the open fuse f102 on the inverter board and a short to ground caused by some component on the right part of the board. By pure luck, the first component I removed for measurement was the one causing the problem. The smd 125v/7a fuse (f102) and the ci 4614b (q310) were replaced and everything worked again. | Bertinetti | |
| TOSHIBA | LC4046FDA | Turns on the backlight and then turns it off leaving only the sound | A burned out lamp | Replace | PATRICK ELETRÔNICA |
| TOSHIBA | LC4046FDA | With imagem, without audio. speakers ok | Check the voltage of the audio output. It's normal, check if tsound is audio at the headphone output. | If tsound is audio at the headphone output, eliminate r264 from the mute circuit. | OLIBIO- ELETRÔNICA ESTUDIER - CANOAS RS |
| TOSHIBA | LC4045 | 5v voltage low and oscillating | Replace qb902 | Replace 2n3904 | jcgiantomaso |
| SEMP | LC4046 | Place the LED would turn off and then it would come back to standby, the LED would light up. When it turned on normally, the menu went crazy, changing functions on its own. | The ir key cable was disconnected, but it continued to change on its own. the vd502 was removed and returned to normal. | Obs. With the removal of vd502 the keyboard no longer works, but in my case the keyboard no longer worked. | joaomvjr |
| SEMP | LC4046FDA | Burning q310 q311 q312 inverter board | Open j76 jumper | Changing the jumper and ci q310 q311 q312 (ao4614b) | TV Center Guaiba |
| SEMP TOSHIBA | LC4046FDA | Turns on and the screen goes dark with no sound as if it wasn't turned on | Bad main board | Replace main board | Gabriel |
| SEMP TOSHIBA | LC3245F, LC4045F, LC4245F | Locking keyboard and remote control | Check the value of the smd resistor in position r602, itsΩic resistance must not be less than 4k7, if it is below this value the track that goes to r580 must be open. | ||
| SEMP LCD 40 | LC4046 | Automatically turning on and off. | Common diodes in the SMD silicon stand by power supply. you measure how good it is. It almost killed me with anger. | Replaces. 1n4148 reset. between them tsound are two zener diodes, | Expedito da eletronica |
| SEMP TOSHIBA | LC3245F, LC4045F, LC4245F | Locking keyboard and remote control | Check the value of the smd resistor in position r602, itsΩic resistance must not be less than 4k7, if it is below this value the track that goes to r580 must be open. |