Hi. I have a DP965LT motherboard and recently I have an issue with it. When I turn on the computer and Windows is starting some times the computer shuts down before showing the session start screen. I've been looking for a solution during a week but I haven't been lucky yet. I found a guy with a DG965RY motherboard discussing the same issue.
The specifications of my computer are:
- Motherboard Intel DP965LT
- Intel Core 2 Duo 2.1 Ghz processor
- nVidia GForce 7300 PCI Express 256 MB
- 3 GB RAM (1 GB DDR 800 Mhz and 2 GB DDR 800 Mhz)
- SATA HD Maxtor 250GB SATA 7200 RPM, SATA HD Hitachi 250GB 7200 RPM
- DVD writer LG
- KWorld TV tunner PCI card
- OS: Failure started when I was using Windows XP SP3. Then I switched to Windows 7 Ultimate 32 bits. Now I'm testing Windows 7 Ultimate 64 bits
The CPU fan has never failed. The usual temperature is fairly warm. The installed operative system when the shut down issue started was Windows XP SP3.
The problem started to happen once every three times I turned on the computer. I installed Windows 7 supposing that it was a software problem but the computer was shutting down during installation. I had to format C partition in order to install Windows 7.
After Windows 7 32 bits was installed the computer worked well for one day. Then it started to shut down again before Windows started. Frequency of failure increased to 3 times before Windows would finally start. Once Windows started the computer has always worked perfectly with Windows XP and 7.
I updated the BIOS with the latest Intel BIOS available in the Intel website. The problem was still on.
I activated the AHCI function for SATA hard disks. The problem was still on.
I removed one DDR memory first and the issue was still happening. Then I removed the second RAM and tried with the first one. The problem was still there.
The failure continued until Windows collapsed and I had to reinstall it, but i bought a new hard disk. So I removed the SATA Maxtor hard disk and installed a new Hitachi SATA hd. Then I installed Windows 7 Ultimate 32 bits and the shut down problem was still present during installation. Then I reformatted the new HD and installed Windows 7 Ultimate 64 bits. It worked but after three restart processes the computer started to shut down again.
I tried disconnecting the power supply and the IDE cord from the DVD, leaving only one hard disk connected and the problem is still there.
When I had Windows XP and the problem started I was using NOD32 antivirus. After I switched to Windows 7 I installed Avast Antivirus instead of NOD32.
I checked the voltage indicators in the BIOS monitoring screen and most voltages are very close to normal values. Some are below and some are over the normal value but it was always the same since I bought the computer two years ago.
I have no clue about what may be the problem. If it's not the motherboard it may be the power supply but after looking for a solution on the web I didn't find anyone with a similar problem except for this guy using a similar Intel motherboard.
I appreciate any help or advice.