TV Repair: Common Faults and Solutions.
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Results: 87573
Results: 87573
Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| PHILCO | TPF2140 | Do not turn on a dead power supply. | Diodo d911 | Midiendo diode as good, replace with new one. | javier fernandez |
| PHILIPS | 29SX8879 | When the image is dark, you hear hissing in the flyback, with scratches on the image, like a high voltage leak | 4.7uf capacitor (2902) and 39k resistor (3901) open. | Replacing the capacitor and resistor. | Lucianomachado |
| LG | 32LD460 | Sometimes it works for a while and turns off | Low pfc circuit. normal voltage between 385v and 390 was 230v | 1.8m resistor mesh. remove, clean, and install other | DEBIQUE |
| LENOXX | CA-316 | Restarts itself when turned on in ac mode | Cold solders on main board | All the primary components of the board were resoldered. | Elias Girardi |
| LG | 20CB67 | Vertical strip at the top | Those who have already done everything couldn't solve it, just change the resistor r301 from 15k to 13k | eugenio barreto | |
| LG | 14FK3RB | Vertical closed | 27k r311 open after replacing it worked perfectly | Protec eletronica | |
| PHILIPS | 21PT5433/78R | Black stripe at the top and 3 colored lines | I replaced the 2465 10uf/160v capacitor in the bd135 collector, it solved the problem right away | This TV would go to waste, but it was resurrected, hugs | wagner poltronieri |
| PHILCO | PT2054 | Does not turn on or when it does turn off after a while. | Shorted transistor q903 bc 337 | After changing the TV ok. | George Pontes |
| AOC | LE22H037 | The power LED turns on and then turns off, it is not enough to activate the backlight | The voltage of 5 v with 4.5 v | C 911 470/10 v at the power supply (usually orange) | Miratec Eletrônica |
| PHILIPS | 21PT5433 L03.1L | Turns on and the voltage is 125v, if you want to lower it a little to around 115v, place a resistor on the collector base of the q7451. | It had a 10k resistor and the voltage was 109 to 110v and the horizontal was a little closed. | I tested several values until reaching 115v with the 55k resistor, good luck. | Eronaldo (erontec) |
| PHILIPS | 21PT5433 L03.1L | Turns on image with inverted cup effect and sometimes turns off. | Defect in the vertical coil deflector is 14 homs and horizontal 4 homs and it was measuring 8 homs. | Check output of the adjustable coil on top of the coil in my case it was broken, I tied it up I did some welding and Pumbaa measured 4 homs and the TV was normal. | Eronaldo (erontec) |
| LG | 32LS3400 | Turns on without image, when pressing standby it turns off but no image appears, short killing the 24v and 12v power supply. It looks like a power supply but it isn't. | Shorted smd capacitor 524 or 523 near the 4 coils next to each other on the main board. | Replace c523 or 524 on the main board | jeanprede |
| LG | 29FS4RL CW62C | Dark image screen with 110v | Diodo 1n4148 com fuga abl zd403 | Replace diode | DEVAIR |
| LG | 22MA33 | Doesn't start. when connecting the 19v power supply it dropped to 0v. | Shorted capacitors. c800 and c804. | Alan Eletrônica Juca Paulo Afonso Bahia | |
| PANASONIC | SA-AK200 | Sound was triggering protection with the display showing code f61. | I noticed that tsound were a lot of cracks in the welds on all the boards. | The plate welds were redone and the problem was resolved. | edcomp |
| PANASONIC | TC-L42U30B | Does not turn on / inoperative | Of 840 | 18 volt zener diode replacement | JESUALDO / JM ELETRONICA |
| SEMP | 2134 SK11 | No sound, that is, when you turn on the TV the sound comes on and cuts off, popping until it disappears. | In my case it was 0 r224, of 10k | Replace the 10k r224 and run for the hug. | ELETRÔNICA JUNIOR- V.GRANDE |
| LG | 32LB9RTA | Keyboard lock | Firmware on rear eprom corrupted. | Rewriting the ic701 eprom or changing it, I don't have the firmware because my recorder is bad so I replaced it. | AntonyGarcez |
| TV BUSTER | 32L05HD | Tsound was no sound and functions were blocking and it stopped starting when the red light was on very brightly. | Changing capacitors. 100uf 16v ca804 and 815 and 470uf 16v | You are really good | Jonatas |
| PHILIPS | FW-C777 | No sound on the outputs, only on the headphones. | R 3325 of 33k open. | Philips fw-c777 sound with audio in the headphones, but without the outputs. I followed all the tips on the internet and nothing happened. the voltages, transistors, stk412 030 output, everything ok. The "letters" in the diagram correspond to the connection of the large ci to the circuit. to unlock the protection, in my case, I placed a 1000mf63v electrolytic on pin 16 letter p of the output ci, this one with the positive ground, because on this pin 16, it measured negative 51 volts and the stk generated audio in the boxes... this without much power. Then I looked at the resistors from this stage that fed pin 16. I found the 33k r3325 open. I replaced it and removed the electrolytic that will be added to unlock the STK and the sound returned to normal, with full power, in my case it was the open resistor. | Giovani pires bitencourt |