T61 WinXP won't stay in Standby or Hibernate

Question

I have a T61 running WinXP that will not stay in Standby or Hibernate modes.  Any time I force the computer to go into Standby or Hibernate, it enters the sleep state then immediately resumes.
Here is a list of things I have attempted:
- Updated drivers for video and network
- Disabled Intel AMT
- Disabled firewall and antivirus
- Disabled network cards to wake on LAN (both in the BIOS and in Device Manager)
- Nothing in the Event Log
- No processes are running when performing standby or hibernate
- Unpugged USB devices
- Disabled wireless (WiFi and Bluetooth)
- Created another local user account and confirmed the problem still exists
- Ran CCleaner for my temp files and registry clean
- No applications running when I attempt sleep mode
Other than reimaging the computer, is there anything else I can do?  The symptoms started after I installed the DirecTV2PC software, which I have uninstalled.

Answer 1

I have the same issue. I've tried a number of things which I listed down below and they are in the order that I did them for the most part. The issues that I have are the laptop will not shut down from start menu, it'll shut down for a second then boot back up.
Running XP SP3 possibly downgraded from Vista Basic, I say this because it is a Lenovo Thinkpad T61 laptop I got from work and has a Vista Basic sticker on the palm rest but running xp.  Can't standby or hibernate, can only shut down holding power button for 4 sec. When I close the lid it will go into standby, (the indicators will go to the half moon, then will jump back to battery. Same goes for trying hibernate and shutdown from the start menu.
From all the options that I've tried, if I enabled them or changed any settings and the change didn't fix the issue, I reset the settings to what they previously were. I talked a network manager who had the same problem where he claimed to have fixed it with some registry settings that he can't remember which ones there were.
1) Checkdisk
2) Defragmenting HDD
3) Cleaned up Hard Drive of temp files
4) Can't properly shutdown from safe mode.
5) Uninstalled Alternative Input Type from Office 2003 (ctfmon.exe)
6) registry edited “powerdown after shutdown” to enabled
7) Unchecked “automatically restart” in system failure settings of startup and recovery in system properties.
8) msconfig: unchecked LPMGR in startup, unchecked thinkvantage registry monitor service in services.
9) Enabled AMT in bios. Changed thinkvantage power control to all modes, and enabled intel amt while cntrl+p options.
10) Reset all options in #9 to default.
11) Updated ACPI Power Management, Management Engine FW and Power Manager from Lenovo site.
12) Updated Bios, uninstalled power manager, uninstalled power management driver both with revo, used ccleaner to clean registry
13) Restarted and installed power management driver and installed power
Any other suggestions? I also tried shutting down without the battery and the laptop plugged into the wall but same deal. I'm trying to find a solution without 1) having to send the laptop into tech support for them to fix or 2) completely reinstalling the OS.
Thanks in adavnced for any help.
Brad