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ok, good news. I'll change it asap. thanks

Sorry, I look near L7100 on the schematic and I see Voltage=1.05, I don't see the table at all. But at least I fixed something. This is good. Pin 3 = 3,26V Pin 13 and 14 = 5V L7630 seems shorted to ground (0,005V). I remove it (to understand where the short is) and I remove also R7640, and...

One step forward.... After replacing U7100 & R7101 on L7100 I can read 0,911V. Should be 1,05V, correct? But still no voltage on L7630.

I'll do that asap

Removed C7102, but short still there.

I checked again and I can confirm a 0V reading. Checking in diode mode I have 0,001V, so shorted. I think C7102 shorted. Correct? Also R7101 seems strange. I read 44 Ohm instead of 2,2 expected from the schematic. Thanks

U7100 All pin at 0, except 14 (20mV), 15 (3,29V), 20 (5V). U7600 All pin at 0, except 3 (3,26V), 4 (0,5V), 7 (24mV), 8-10-11-12 (30mV), 13-14 (5V). L7100 to ground 41,6 Ohm L7630 tp ground 13 Ohm Thanks

Removed, no change. ALL_SYS_PWRGD don't goes high. About the coils: L9710 = 0V L3895 = 322mV L7260 = 3,34V L7720 = 1,81V L7770 = 1,53V L7220 = 5,01V L8920 = 0V L7550 = 0V L7510 = 0V L7520 = 0V L7530 = 0V L7030 = 12,55V L7100 = 0V L9560 = 1,51V L7630 = 0V L9510 = 1,02V L7330 = 1,5V I hope I...

I will check ASAP No. Only a little when I remove power connector. No After a while I was able to find a very hot component. Is U4800. Is so hot I can't place a finger over it. I think it is gone. Could be the reason the board don't start? As I can understand is an infrared receiver. Could I...

ok, strange things happen here. With voltage injection nothing start heating. But I see, after a while, that the current goes down to a low level. So I check again with diode mode the possible shortcircuit and it was gone :oops::oops:. The only thing that could be happen is that the shortcircuit...

Sure I will test the injection and see whats happen. Thanks

Hi, I made a stupid thing while trying to fix a fan connector issue on a 820-2914-A, shortcutting the PP5V_S0 to ground. After that I'm sure something blown, because I heard it and I smell it. Searching with microscope don't show anything damaged, but obviously the board is not working...