Here's a real head scratcher...
A customer's laptop (Panasonic Toughbook) will log in and run perfectly fine while plugged in to AC power. Great. Now, if I unplug the laptop, then turn it on, it never gets past the Windows logon screen. If I plug it in, get past the Windows logon screen, then unplug the AC adapter, it keeps running for a good 3 hours.
I then tried to start it up, let it charge, then reboot without the AC adapter, even though I know this battery is full, and it still shuts down at the logon screen. Therefore, I know it is not the battery, at least it doesn't seem like it. I ran a Memtest86 on the RAM, no issues found. I ran a
CHKDSK /f /r on the hard drive attached to another computer, no issues found. I also ran the Western Digital Data Lifeguard diagnostics program, again without issue. As a final struggle, I scanned for viruses on our virus checking computers with Microsoft Security Essentials, Malwarebytes Antimalware, and with Norton 2012
What type of issue should I be looking at next?
- Safe mode works
- Removing ALL non-Microsoft services and all Startup Items in MSCONFIG does not work