A week ago my Sony Vaio, that had just inched past the warranty period, refused to boot up. This was following a power surge/spike and I thought the computer was completely fried. After a few hours of troubleshooting and trying things, I finally found out the problem.
The battery.
Now, you would assume the battery would have nothing to do with the computer starting up. Indeed, I would assume some people run their laptops without the battery altogether. But in my case, I found out the laptop needed the battery to start up.
Unfortunately, my battery was zapped/drained of all energy too.
So, what I did was … wait. I removed the battery from the laptop compartment and set it on my desk for an hour, put it back into the laptop, plugged in the AC and it booted up. It would seem that if the power is completely knocked out of the laptop, it still needs a boost of battery power to get it going – even with an ac adapter.
Without the battery, my laptop wouldnt start up, and the “plugged in” indicator on the laptop wouldn’t even light up. The AC adapter looked fine, and tested fine, but it would not power on the device until the battery built up enough charge by remaining dormant and then finally it had enough juice to start up and begin charging the battery again.
I think maybe the shock drained the CMOS battery, and it needs to draw from the battery to get it going again.
Now that it is up and running – no problems! I hope this helps others with the same issue with their Vaio laptop not powering on.
I had this happen to me. The computer battery zapped to nothing instantly. I kept it plugged in and waiting a few minutes. It came back on and the battery was 1% but charged fully within an hour of usage. I had it plugged into a surge protector, but don’t know what happened, but glad that the battery recharged. Using Sony Vaio PCG-71312L laptop. I do have all of the backups.