**System randomly hangs**

try to test ram module another computer
also check all fans is it working or not

Do extensive diagnostic tests:

1. Set BIOS to default settings and do not use overclock settings, check.
2. Memory test, download ISO image, burn it onto cd and boot from it.
If memory fails after several hours testing: Replace memory
3. Flash the latest (original)[beta] BIOS version.
4. Connect just one (1) harddisk and test for longer time. *
5. Add second harddisk and test for longer time. *
6. Add third harddisk and test for longer time. *

* If connecting or adding harddisk leads to freezes, exchange that harddisk and retest.

There is loosed connection in the mother board replace the H.D.D connector. it will fix the problem good day and best regards.

Make sure you have the latest drivers and Bios version from Dell.

Try going into the BIOS and selecting safe or minimal settings/options save and reboot. If this works go back to BIOS and make changes one at a time until it may not work again, then you will know which option is causing the system hang ups. My guess is also your motherboard is SATA 1 capable (1.5
gbs) not SATA 2, in which you could purchase a separate controlller card for your HDD. Good luck.

Either the battery which has been replaced is faulty else it is not seated properly. Also after replacing the battery, clear the BIOS and then re-enter the settings starting with default settings and then changing it as required. If the battery was to work then this loss of date & Time won't happen every time. Also look for the Jumper meant for flashing the BIOS, I hope it is in its correct position............sodeep

It is a motherboard problem. But you can disable that alarm from the BIOS. I would simply raise the upper threshold in zone two from 56 to 60 if I were you. If it still flashes red put it back to 56 and disable it.

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Maybe having trouble with a device, remove any pci or agp cards and usb devices, use built-in video until installed.

Set bios to defaults, make sure bios is latest version.

I have found this happens with a promise ultra-100tx2 and any nvidia video card.

May be a bad install cd, if you can boot it with a dos or win98 disk/CD, copy xp i386 folder to hard drive install from i386 folder on hdd by running winnt.exe

I have installed xpsp2 on about 10 d865gbf's and 2 days ago installed xp sp3 on one with no problems. may also be bad mobo.

Does your System freezs before booting up? Try setting the BIOS to defalut. There could be a software related problem also. Try reinstalling the windows.Your hardware seems well match for the entire system(Provided all are ok) It was not clear where the system freezs.