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Computers shutting off randomly

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  • CPUs
  • Computers
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August 12, 2009 7:33:34 PM

Sorry, I couldn't find a proper category to post this in :( 

Three computers in my office have been rebooting automatically at random times. Either all three will reboot at once (this happened during work once), two will reboot, three will reboot and Computer 3 will be stuck at the first BIOS loading screen (the one with graphics). Sometimes the monitor for Computer 3 doesn't receive a signal or will report that the signal input is out of range and will require one or two reboots to display again. All three computers are connected to a network with a server. I just noticed that while a label was printing, 'waves' went across the whole monitor of computer 2.

Since this is happening to all three of the computers, could there be something wrong with the power? A faulty electronic device that is affecting the outlets in one area? Error with applications or files that are hosted on the server? What do you guys think?

Computer 1: Compaq Presario SR1320NX.
Computer 2: Compaq Presario S3200NX. This computer is connected to a "UPS" that doesn't have UPS and only one side of the outlets work.
Computer 3: MSI 790GX motherboard, Corsair 400W power supply, Phenom II 550BE processor, 2x2GB G.skill DDR1333 memory, 30GB OCZ Vertex solid state disk, Antec 300 case. It uses a Hanns-G HW191D monitor that has a loose power connection. This computer is connect to a 'surge protector' that probably got baked in an oven by the previous computer in the cabinet (the computer case was hot to touch). There's no light to indicate whether it is surge protected.
Computer 4: Dell Dimension 5150
Server: Q6600, Promise raid 1 controller, 2 Seagate 7200.10 drives, Intel G31, G33, P31, or P35 motherboard, 2GB memory

Event log-

Computer 1 has recently had a lot of bad block errors for the hard drive. Yesterday, there were about 40 errors just for that.

Computer 2 System Errors

Sharing printer failed + 1722, Printer Zebra ZP 500 (ZPL) share name ZebraZP500.

The browser service has failed to retrieve the backup list too many times on transport \Device\NetBT_Tcpip_{C1F5C7ED-BD58-4ED8-8D2A-748828956964}. The backup browser is stopping.

The browser was unable to retrieve a list of servers from the browser master \\H2HMAIN on the network \Device\NetBT_Tcpip_{C1F5C7ED-BD58-4ED8-8D2A-748828956964}. The data is the error code.

The time service has not been able to synchronize the system time for 49152 seconds because none of the time providers has been able to provide a usable time stamp. The system clock is unsynchronized.

The attempt to shutdown YIPING-2 failed

TCP/IP has reached the security limit imposed on the number of concurrent TCP connect attempts.

The time provider NtpClient is configured to acquire time from one or more time sources, however none of the sources are currently accessible. No attempt to contact a source will be made for 14 minutes. NtpClient has no source of accurate time.

The IP address lease 192.168.1.33 for the Network Card with network address 02121755A338 has been denied by the DHCP server 192.168.1.1 (The DHCP Server sent a DHCPNACK message).

Computer 2 Application Errors:

The description for Event ID ( 4 ) in Source ( QuickBooks ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: QuickBooks, Returning NULL QBWinInstance Handle.

EventType officelifeboathang, P1 outlook.exe, P2 12.0.6504.5000, P3 ntdll.dll, P4 5.1.2600.5755, P5 NIL, P6 NIL, P7 NIL, P8 NIL, P9 NIL, P10 NIL.

Computer 3 Application Errors:

The description for Event ID ( 4 ) in Source ( QuickBooks ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: QuickBooks, Returning NULL QBWinInstance Handle.

Windows saved user HEART-1\Yi Ping registry while an application or service was still using the registry during log off. The memory used by the user's registry has not been freed. The registry will be unloaded when it is no longer in use.

This is often caused by services running as a user account, try configuring the services to run in either the LocalService or NetworkService account.

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a c 172 à CPUs
August 12, 2009 8:10:54 PM

What changed just before the systems started rebooting?

You clearly need to look at everything the three systems have in common.

How often does this occur? If it's fairly frequent, what does disconnecting the network do?

Could a virus propagating through the network cause this?
August 12, 2009 9:27:39 PM

All computers have one thing in common that is overlooked when troubleshooting; AC outlets.

Get a volt meter and test the AC outlets and make sure the voltage isn't dropping off.

If voltage drops off it causes a computer system to reboot.
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