Hello,
My Sony Vaio VPCS111FM started to hesitate to turning on. In order to explain properly I uploaded a video on youtube. You can see at this link.
I tried power reset by removing power adapter and battery, but it did not help me to solve problem. For this reason I replaced its main board mbx-216, but unfortunately same problem struck again. I believe this main board has some design defects on itself.
In order to solve this issue I applied hot air on the main board, and it worked! Hot air solved this issue at least temporarily. You can see where I applied hot air on the main board below
I think there are some capacitor problems on this board.
Where should I look at? How to find defected component of this board?
P.S.: I probed U18 Pin 27 (VRON), it is synchronized with LED light of the power button. Simply EC cannot hold VRON pin logic high to enable PU1.
My Sony Vaio VPCS111FM started to hesitate to turning on. In order to explain properly I uploaded a video on youtube. You can see at this link.
I tried power reset by removing power adapter and battery, but it did not help me to solve problem. For this reason I replaced its main board mbx-216, but unfortunately same problem struck again. I believe this main board has some design defects on itself.
In order to solve this issue I applied hot air on the main board, and it worked! Hot air solved this issue at least temporarily. You can see where I applied hot air on the main board below
I think there are some capacitor problems on this board.
Where should I look at? How to find defected component of this board?
P.S.: I probed U18 Pin 27 (VRON), it is synchronized with LED light of the power button. Simply EC cannot hold VRON pin logic high to enable PU1.
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