VAIO laptop won't turn on [VPCZ22AJ]
A week ago, I pressed the power button to bring my computer back from sleep mode and it suddenly shut down without even turning on the display.
Then I tried to fix it, unplugged the power/battery/cmos battery, pressed the power button for a minute, then returned it and pressed the power button again, but it wouldn't start.
Next, I opened the back cover, disconnected all the connectors to the main board, applied CPU grease and reassembled, and it turn on. then I ran a windows ram error check, but there was no problem.
Then for several days, I was able to use it as the same as before without any power off, but at one time, it entered sleep mode and the same symptoms occurred. I tried the same repair procedure and replaced the cmos battery with a new one, but it doesn't turn on.
I also tried to remove the RAM, but I couldn't remove it due to the special connection.
Symptoms of pressing the power button are: no power LED, no fan rotation, wireless LED lit for a couple of seconds then shut down. Same for both batteries only DC cable only.
The power button did not respond again unless I removed the battery aftear this.
Please give me some help.
( I'm Japanese and I use machine translation to revise my work, so I apologize if there is anything in the text that doesn't make sense or is hard to read. )
Luckily, it's up and running right now!But I think the same symptoms will occur.
Here's what I tried.
First, I warmed up the AC adapter a little (because I experienced a PC with a weak power supply taking a long time to boot up before).
Then DC plug in with no battery, turn on the power button, and if it didn't start, unplug it and try again.When I did this 3 times, it started up.
Is there any cause for this?
Let me know if there's anything else I should check while it's up and running.
Bu iyi bir soru mu?