I'm trying to fix my grandpa's TV - Philips 42PFL3606H/58 (TPM6.1E). It was working normally up until now, he said that while he was watching the TV at first the display went off, and after around 30 minutes, he lost the sound also. He tried to turn it on, but it wouldn't turn on anymore.
While plugged in it draws 9.7W, there is no red and green lights. While pressing the remote (power button, prog +-, etc.) or the buttons located on the device, it reacts and the red light blinks after the keypress. After pressing the power button, total power consumption falls to 0.1W, and after pressing it once again, it raises again to 9.7W.
I checked the voltages on CN903 (both before and after pressing pwr button and then after disconnecting mainboard) they are as following:
MB plugged in(9.7W) /// after pressing pwr btn(0.1W) /// MB disconnected (0.1W)
ENA -- 5.10V /// 0.05V /// 0.00V
DIM -- 2.68V /// 0.08V /// 0.00V
12V -- 0.28V /// 0.00V /// 0.00V
24V -- 0.00V /// 0.00V /// 0.00V
S/B -- 3.26V /// 0.08V /// 0.00V
5V -- 5.19V /// 4.71V /// 4.70V
PSU: 715G4802-P01-H20-003H
MB: 715G4609-M3A-000-005X
I noticed a few things... While plugging in the power cable, i can see a tiny spark on SG902 for a moment. No clicking sounds, blue LED on the back of the PSU doesn't turn on at all. Diode D910 is shorted. Voltage on C946 is 8.19V, and on C907 315V. There is no excessive heat generated anywhere on the MB, processor is mildly warm on the touch.
I'm trying to narrow down the fault.
Any help would be greatly appreciated.
While plugged in it draws 9.7W, there is no red and green lights. While pressing the remote (power button, prog +-, etc.) or the buttons located on the device, it reacts and the red light blinks after the keypress. After pressing the power button, total power consumption falls to 0.1W, and after pressing it once again, it raises again to 9.7W.
I checked the voltages on CN903 (both before and after pressing pwr button and then after disconnecting mainboard) they are as following:
MB plugged in(9.7W) /// after pressing pwr btn(0.1W) /// MB disconnected (0.1W)
ENA -- 5.10V /// 0.05V /// 0.00V
DIM -- 2.68V /// 0.08V /// 0.00V
12V -- 0.28V /// 0.00V /// 0.00V
24V -- 0.00V /// 0.00V /// 0.00V
S/B -- 3.26V /// 0.08V /// 0.00V
5V -- 5.19V /// 4.71V /// 4.70V
PSU: 715G4802-P01-H20-003H
MB: 715G4609-M3A-000-005X
I noticed a few things... While plugging in the power cable, i can see a tiny spark on SG902 for a moment. No clicking sounds, blue LED on the back of the PSU doesn't turn on at all. Diode D910 is shorted. Voltage on C946 is 8.19V, and on C907 315V. There is no excessive heat generated anywhere on the MB, processor is mildly warm on the touch.
I'm trying to narrow down the fault.
Any help would be greatly appreciated.
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