1. Use just one stick of ram or none if the machine has onboard ram. Try one slot, then the other. Why? ikenfixit.com knows about the sockets may need the solder reflowed. It's worth doing.
2. How long since you used the compressed air to clean off the heatsinks?
Best of luck, but my bet is item 1.
I have a Sony PCG-FX240 notebook that's almost 4 years old, running on Windows ME. It worked without fail until this particular problem started. Here's a rundown of the symptoms and what I've already tried:
- It started rebooting by itself. There have been previous posts about rebooting, but the suggested fixes either did not apply or work for my computer.
- Sometimes it won't reboot anymore. But the green light indicating power is lit. I'll shut down completely by pressing the power button for a few seconds. Then I'll retry several times and on my 10th attempt, maybe it will boot up. Lots of times, it'll just hang with the screen black or ''SONY'' on it.
- I ran scandisk and defrag repeatedly.
- I've already reformatted my harddrive and re-installed the software using the System Recovery CD. Didn't fix the problem.
- The longer I don't power up my computer, the longer I'm able to use it the next time before it reboots.
- I've also removed/reattached the RAM and made sure it's securely in its slot.
- In case it's the battery (still using the one that came with the computer), I removed it and tried runnning on just AC power. No change, still reboots.
- I tried doing a manual format of the harddrive from the C> and D> prompt, but all the text on the screen turned into gibberish.
Would greatly appreciate any help.