Skyworth LCD TV 32L16SW power failure caused by the failure of the boot and gray screen fault repair example - android - Phones Developers

MOS power IC full range

KKST patch plug-in active passive crystal oscillator hot sale 24.576000MHZ

Skyworth LCD TV 32L16SW red light is not turned on, the detection power output 5V is only 3.5v, replace two 470UF/10V capacitors, the voltage rises and starts. Look at the backlight to think it is repaired, but the screen is gray-blue without characters. The motherboard has already output 12V to the logic board. It seems not so simple!
When there is something going out, the TV is turned off and the maintenance is stopped. After the repair, the backlight is flashing. The 5v 12V and 24V are slightly lower, and the measured values ​​are 4.5V 10V and 22V. Remove the aluminum plate to see the 12V power supply capacitor 16V470UF capacitor has been drum kit, the 12V capacitor on the whole after the fault phenomenon is still the same!
Remove the aluminum plate from the primary power supply and find a condenser drum kit (400v10UF)! Is this caused by a bad capacitor? A: No! Change it still the same! Continue to check, the measured PFC large capacitor voltage is 300v, power failure in the road test C84 25V100UF capacitor no capacity, after the new PFC voltage rises to 370V, the power supply output voltage is also stable! But the image still didn't come out!
Check the motherboard and the logic board did not find the problem, with a try to write a LG screen data (memory 24C32), then see the blue screen really came out! I am happy to see the picture but there is a string of letters! Wrong data written? Because the screen model is under the iron plate, I have to take a look at it and I have not removed it. It doesn't matter! There are CMO screen data in hand, come again! There are still letters in the writing, no! It is impossible for the two data to be wrong! Looking for Skyworth universal remote control, remote control shutdown (button no standby function) and then open the letters are not out! The sound signal of the video signal is normal!

Attach this machine two data
[attach]441601[/attach]
[attach]441613[/attach]
[attach]441611[/attach]
[attach]441612[/attach]
Skyworth 32L16SW.rar