The fan comes on briefly and then stops. Replaced CMOS battery as I did manage to get into setup once and saw that date/ time and other settings were lost but mostly I can't get machine up. I am open to all suggestions! Some of the solutions I have seen for other mobos seem to suggest a bios upgrade but I don't understand how to do that if you can't power on the machine.
Thanks in advance!!!
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Re: My A7N8X-VM Mobo won't power up
I do have a question - was this memory functional in your board before or is this a new install/upgrade?
Many times the issue you've described can be memory related. This is a link to the types of memory your board will support - pay close attention to the voltage, if the memory you are trying to use right now has the wrong voltage you will get no post and/or video (and on occasion error beeps).
The other thing you can try is resetting the CMOS (via the onboard jumper which should be near the battery). Instructions on how to do this should be in your mobo manual.
....and of course, ensure that both power plugs are connected to the mobo.
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HI, Clear CMOS or remove CMOS battery, Press the on off switch for 30 seconds. Now go to BIOS setup,and set bios fail save default,and press F10>enter.If the problem same change the RAM if you have a spare. http://www.computerhope.com/help/phoenix.htm
Oh, you need to go into your BIOS, for that Motherboard, you should press alt+f2 while it boots up and that should load you into BIOS (or it might be called Setup). Once you're in there you need to change your Date and Time to the current date and time. Hope that helps!
if you can figure out what pins your power switch is plugged into you can try and bypass the switch as for the power supply itself i know theres a way to trick it and boot just the power supply but i cant remember what pins on the plug it is try and google the power plug layout it should tell you what pins to connect to boot it
I tried different power supply but its still not powering up. But when i remove the 4 pin 12V cable from power supply the cpu fan is rolling, it means that the power supply is working but when i tried to connect the 4 pin then the cpu fan stop just a second and never rolled on. The main problem is the 4 pin, the model is Asus P5P800-VM. I tried to reset the cmos and replaced the battery but it wont work out. Please help me!!!
If all was working fine before, then, you have either not connected the cpu power cable, as is sometimes required other than being powered by the processor socket, or your power supply unit is not pentium 4 compatable and is unable to power the processor.
Here was the fix for me. The machine refuses to boot if the video card is not functioning. It should have one long beep however to tell you that there is a video problem. Someone hooked up our speaker incorrectly though! So we got no beeps. Once the speaker was hooked up and the video card was replaced, all is well!