TV Repair: Common Faults and Solutions.
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Results: 87571
Results: 87571
Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SEMP TOSHIBA | LC4245W NC | No image with back light active | F801 open check if tsound is a short tsound are some capacitors that also short if ok in my case on the main PCI c915 with leak | Paulo Pinho | |
| SAMSUNG | LN40A330J1 | Does not turn on, STBY LED off, no 5v1 | Zm802 zener diode shorted or leaky (it cannot have any leakage) | Have you already killed yourself measuring smds, replaced the um801s ic, replaced all the capacitors and nothing? replace the zener that goes up, if less than 5v goes up on pin 3 of the cn801 then check the entire 5v line and replace the couplers. good luck! | Snegs Eletrônica |
| LG | CM9730 | No audio | Turns on works normally cd, radio, bluetooth and usb. when you increase the volume no audio comes out on the 4 outputs, measure the voltage that feeds the pre-amplifier and mosfet -40v +40v it is giving 4.6v this is low, I removed the 18mn60n mosfet to see tsound is a leak they are all good, the defect was a short in some components: pc902-el817 is shorted, q956-ktc3203y is leaking, zd903-code smd y5w 16v shorted, on pin q956 to two resistors r973 and r998 - 22r open smd, on the same track as the bad c932-22uf 50v resistor, replace it, zd904- 16v smd code y5w with leakage, remove it from the board and test, ic902 - ice1h01-1 with leakage, I replaced these components and the horn appeared -40 +40 and audio normalized | Defect resolved | Andre |
| SEMP | LC4244 | The TV sometimes turned on, but most of the times it didn't turn on. | Tsound are several 22ufx50v capacitors on the power supply board that are deficient, but one of them was completely dry. | Replace of all 22μFx50v capacitors in the power supply | Lucas E. Periotto |
| SEMP TOSHIBA | TV2089 | AV has normal video but no sound, TV has normal sound | Was replaced main c.i 8813xxxz | José delta line | |
| SVA | DVD D1000 | Does not turn on, missing some power supply voltages | Diode d8 sb360 openly at power supply | I put another one and it worked normally again | Réis eletrônicos |
| PANASONIC | TC-L42G11 | Turns off by itself after a while. Unplugged after a while, it turns back on. | Resistor smd r842(150kω) | Renato Link | |
| LG | CM9730 | Standby LED doesn't turn on, press the power button and the remote control doesn't turn on | This defect is not a power supply, nor the main board, they are touch switches with a problem, I replaced them all, and not just the switches, near the bu2090f around the LED set, some are shorted on the other side, I also replaced all the LEDs with leaks and shorts, I turned on the sound worked | Defect resolved | Carlos |
| LG | CM9730 | No audio on all 4 outputs | Measure the voltage on the power supply board +40v and -40v, it is giving 0v, I removed the mosfets, all 4 are leaking 18mn60n, I replaced them with the original, solved, audio normalized, 4 outputs worked | Defect resolved | Andre |
| LG | CM9730 | Turns on in seconds turns off | Photocoupler el817 3 with leakage, 1 shorted and pc902 on the pin of this photocoupler to q956 - ktc3203y with leakage, on the pin of this transistor the zener diode shorted zd903 - code y5w, and a 16v smd diode, I changed the sound, it turned on, it didn't turn off but | Defect resolved | Andre |
| LG | CM9730 | Doesn't start | Test the power supply it's ok, the cause was a faulty touch switch, I replaced all 3 boards and it wasn't just the touch switches either, near the bu2090f the LED was short, I tested it on both sides I replaced them all | Defect resolved | Andre |
| CCE | HPS-1471 | A black stripe on the left side of the screen shaking | After a lot of head banging I found the r-414 open total 18 k resistor | Just make the replacement and that's it | ELETRÔNICA CAVALCANTE MARTINÓPOLE-CE |
| SAMSUNG | LN40B550K1V BN44-00264A | Does not turn on or turn on standby | Verrificar q1820 q1821 (5n50ut), ci um8015 st strw 6252 e fusivel 8025 de 3,15a | sergiopax | |
| CCE | D3201 | Flashing video | Cold solder trafo t1, causing variation in 12volts | Solve trafo | Diego Boeira |
| HB BUSTER | HBTV 3203HD | Does not turn on, nor does the standby LED | No voltage 5 volts standby, only primary voltages. | Diode d905 shorted. | Paulo Valdir |
| PHILIPS | 14PT314A/78R | When changing the fly_back the TV worked normally but after a few minutes it started to turn off intermittently and also when pressing the volume key the TV entered the menu | Q7611 | Just make a jump on the base and collector of the 7611 smd transistor and the TV will work normally. Praise be to God! | Sinailson furtado |
| CCE | D3201 | Flashing video | Cold solder trafo t1, causing variation in 12volts | Solve trafo | Diego Boeira |
| SAMSUNG | UN40J5200AG | TV doesn't turn on at all | Without 13v at the power supply output | Measure the three diodes at the 13v output. dm8610, dm8620 and dm8630, one of them will have a short circuit and just replace it | Brenner |
| SONY | MHC-GTX888 | Doesn't start | 12v transformer open, and diode d1200 shorted | Replace transformer and diode solved | Lino |
| HBUSTER | HBTV-32D05HD | Only blue LED, supply voltages ok | Lack of 1.5v for the ddr memory - d26 and d27 in the main open causing lack of voltage in the up8 IC responsible for powering the ddr | Replace of d26 ( 1n4001) and d27 ( 1n4001 ) | Guilherme - GL Eletrônica - Contagem MG |