Greetings,

First of all excuse me for speaking in English.

I got a Lenovo L420. The main problem was that it wasn't turning on and no LEDs light up. I replaced RT8206M, PR280 2.2Ohm and U11 which was a uP0104p. The laptop now turns on for a sec, there is LED indication, it has +3V and +5V, but i got short at +VCCSA. There was a short at PU9005 (OZ8117) pin 17. Removed it until i get a replacement. Tried to test without IC, but then i got a short one after another at PD1009, PC9115, PQ9033, PQ9034. I replaced the mosfet a couple of times but the always short. Removed PD1009 and PC9115 and again i got short at the mosfet. Any help would be appreciated.

Regards

Update: The board doesn't have any shorts. Tried to program the bios, but the chip was faulty. Replaced with a new chip, programed it, but the board doesn't power on for more than 2-3 seconds. When i press the power on button, only the Green LED lights up for 2 seonds then stops. I don't have any idea where to look next.