An old computer that has been working perfectly for three years has started to behave strangely after it had been reassembled in a new case. Now it always restarts in 4 seconds after shutdown, no matter was it turned off with the power button or programmatically, by the OS means.
I would like to get rid of such a behavior, but I have no idea about its reason, and how can I cure it.
I have unplugged all devices and add-on cards, taken the motherboard off the case, disconnected the front panel wires, cleared CMOS and changed the battery, tested the MB with three different PSUs, even tried disconnecting the keyboard and the mouse — the behavior does not change. Now it's just a bare motherboard connected to the power supply that lies on a table — and it still goes on in 4 sec. after it had been turned off. Holding the power button pressed (or power switch pins closed) for 10 — 12 sec prevents it from going back on. All the BIOS settings pertaining to power management are disabled (AC back — Always off, Power On by keyboard and — disabled, etc.)
The CPU and the RAM are the same that were used before, I have not even uninstalled them.
It definitely has no bearing on the OS, as this behavior remains the same without even HDD/SSD connected and after resetting CMOS.
The hardware is:
- mobo: Gigabyte GA-H61M-DS2 rev 2.0, BIOS F4 (12/21/2011),
- CPU Intel Core i3-2130, 3400 MHz,
- RAM Kingston KVR1333D3N9/4G x 2, 1330 MHz
Best Answer
Press Windows Key + R and type in
regeditand hit enter. Locate the following key:Location:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\WinlogonDouble Click on PowerdownAfterShutdown
Then, Change it to "0" if it is "1"
OR
Change it to "1" if it is "0".
And hit Enter.
Then restart the computer and after it restarts try to shutdown again. Hopefully this will work for you.
But if this doesn't work make sure you change the value in
regeditback to what it was originallyThen You try this:
ErP Ready mode must be enabled under the APM Configuration in the BIOS.