Lenovo IdeaPad L340-15IRH - NM-C361 turns on and stays on but no CPU Vcore
I've been working on this laptop for a weeks it was in another shop the owner was cleaning thermal compound with Akai Dry Spray it's a Video Cleaner and the laptop didn't turn on after and it's been in the other shop for 2 weeks when I got the laptop it had ripped pads for PU702 (SY8286RAC) and the IC was missing from the laptop it's responsible for VCCIO line I've repaired the pads and put in a new IC and and the laptop is turning on fan spins for a second then nothing happens laptop stays on but without Voltage on CPU Vcore
here's Some rails and signals I've measured
I've tried to flash bios too that didn't change anything
I am not sure how to proceed from here any advice is appreciated thanks in advance
here's Some rails and signals I've measured
| +3 VLP | 3.295v |
| AC IN | 3.261v |
| EC ON | 3.29v |
| +5V ALW | 5.131v |
| on/off BTN# | 3.263v |
| 3V EN | 3.29v |
| +3V ALW | 3.336v |
| 1.8V ALW PWR EN | 3.289v |
| 1.05V ALW PWR EN | 3.29v |
| +1.8V ALW | 1.869v |
| +1.05V ALW | 1.064v |
| PBTN_OUT# | 3.29v |
| EC_RSMRST# | 3.285v |
| SLP_s5# | 3.335v |
| SLP_s3# | 3.336v |
| SYSON | 3.289v |
| +1.2v | 1.233v |
| +2.5v | 2.526v |
| SUSP# | 3.286v |
| +5VS | 5.129v |
| +3VS | 3.335v |
| +1.8VS | 1.87v |
| +0.6VS | 0.614v |
| KBRST# | 3.29v |
| 0.9VS_PWR_EN / VCCIO _ EN | 3.29v |
| +0.9VS | 0.954v |
| VR_ON / CPU Core on | 3.287v |
| CPU Vcore | 0v |
| SYS_PWRGD_EC | 3.29v |
| CPU_PWROK | 3.33v |
I am not sure how to proceed from here any advice is appreciated thanks in advance
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