Elitedesk 800 G1 SFF restarting on its own

[SSB196]

Hello,

We have 20 Elitedesk 800 G1 SFF units; running Windows 7 Pro 64-bit.  One one unit, an intermittent issue.

Use Shutdown from Windows, computer shuts off.  Sometime later, during the night, it turns back on.

Interesting note: we have a power-on password set in the BIOS, and turning on the computer results in a password prompt.  When this unit randomly restarts, it seems to bypass the password and goes directly to the ctrl alt delete screen to login to Windows.

I have tried turning off any "wake" options that I can find for the NIC, mouse, BIOS settings, and even tried the registry hack for HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon "PowerdownAfterShutdown".

The BIOS, Chipset are both updated, as are all other drivers suggested by HP.

I have witnessed the restart once - I shut down, looked at the front of the computer, all lights were out, and it restarted.  I had not touched a thing.  Of course, I have not had it restart like that in front of me again. 😕

Any additional ideas?

thnaks
 
 

[Mister_Do]

Hi tech_DLS,

Do your PCs have wi/fi? I'm wondering if the wi/fi is causing this. I've seen issues with other motherboards where wi/fi software/hardware can cause a PC to turn on like this.

[SSB196]

Sorry - no wi-fi in this computer.

[Support4all · Accepted solution]

Call our hp elite support @ 1-800- 334-5144

[EntreMatt]

I just got off the phone with Authorized Service Provider Tech support.  This BIOS updating did not resolve the issue, but removing CMOS battery and powerdraining proved successful.

[SSB196]

Hello,

We tried a number of things; including turning off any tasks we could find.  Eventually, I found that disk defrag was set to automatic, and I disable that.  The power up at night thing has not re-appeared since then.  Even though a defrag schedule is *not* supposed to power on a computer.

[HeloIT]

Pulling the CMOS battery, pressing the CMOS button and power button a few times worked for me.

[jr18]

How do I stop my computer starting on its own, after I shut it down? Altered automatic updates so  won't shut down on it's own.  What can I do to cure this problem besides return it to the store.

[ljmodino]

We have hundreds of 800 G1 affected and probably 800 G2.

No HP solution on this moment...

[94tbird]

Has anyone found a solution to this?  I have a 800 G2 CMT tower, BIOS updated to the latest 2.15, and have tried the CMOS battery pull, and power drain method with no luck.  I have 2 of 9 machines exhibiting this behaviour.