Member Avatar for navinkhemka

I have bought a new desktop machine with AMD phenom Processor and JM26GT4 motherboard.

My system used to shut down abruptly without giving any message, i used to work in Windows XP, recently i have changed the operating software to Windows Vista (Basic Home edition), it worked fine for first 2 days and now again it has developed a habit of getting shut down as if somebody is putting off the power.

In system maintenance log i found "System Service error", which stopped while installing automatic updates of windows.

i dont know how to solve the problem, whether it is a software problem or any hardware problem.

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reported sudden, total power-offs on a new desktop and suggested checking temperatures. The pattern in this thread points to a stepwise hardware-first diagnosis plus a few targeted Windows checks so the cause can be isolated without guessing.

Start by isolating hardware. Disconnect all nonessential drives and peripherals and boot with the minimum (one RAM stick, onboard video or single GPU, CPU, PSU). Reseat memory and expansion cards and inspect the board for bulging capacitors or loose power connectors. Try a different mains outlet, power cable, or UPS. If possible, swap in a known-good PSU or measure the 24‑pin connector rails (+12V, +5V, +3.3V) under load; large deviations or instability under load indicate PSU or motherboard faults.

Do the OS-level data collection next. Turn off automatic restart on system failure so any bluescreen stays on screen (Control Panel → System → Advanced system settings → Startup and Recovery). Collect minidumps from C:\Windows\Minidump and review timestamps in Event Viewer and Reliability Monitor to correlate crashes with hardware events. Run a full memory test (MemTest86) and check drive SMART health; both can catch intermittent hardware errors that cause abrupt power loss.

If the machine still powers off while running a Linux live USB or before an OS loads, the problem is almost certainly hardware — pursue RMA or vendor support. If the shutdowns only happen in Windows, focus on chipset and graphics drivers and try a clean OS install. Avoid BIOS flashing unless you have a stable power source and follow the motherboard vendor instructions.

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Member Avatar for PcPro12

that is a symptom of CPU Over Heating...get a free program or something to monitor your CPU Temperature...if it's over 50/60-80C+, than it's CPU over heating...but it would be odd since it's a new machine...but either way, check it to make sure...

Member Avatar for navinkhemka

I have tested the heat sink of the CPU it is perfectly connected, in the BIOS setting the CPU tempretaure is set to be monitored "auto".
Its getting turn off sometimes within an hour, and sometimes in 3 hours, while quite often befor starting windows it turns off.

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