Question about ASUS P4P800 SE (890552603657) Motherboard

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Fans runs but no post,no beeps.

When turned on the fan runs, no beeps no post.
Have checked most of the power fets,seem to be O.K.
Tried memory replacement, CPU,video card,bios chip.
Is there any common problems with this boards?
I have another P4P-800SE board that is the same way.

Thanks Steve

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Re: Fans runs but no post,no beeps.

The best advice I can give you is to remove the motherboard battery (UNPLUG THE PSU BEFORE YOU WORK ON THE MOTHERBOARD) and let the system sit for about an hour. If the CMOS settings are corrupted, removing the battery will erase the corrupted data in the CMOS, which will automatically reset the CMOS to the default settings... Then, plug the battery back into the motherboard, and try to boot the system...

If that doesn't work, you should disconnect EVERYTHING attached to the PSU, and remove ALL of the add-in cards (modem, NIC, soundcard, TV tuner, whatever you have), and install ONLY the CPU, the heatsink/fan (don't forget to PLUG THE CPU FAN IN), ONE stick of RAM... you get the idea. DISCONNECT the HDD, the FDD, the optical drive, and ANYTHING ELSE from the PSU. When you're ready to test the system, you should have ONLY the CPU, the HSF, and one DIMM plugged into the motherboard. Attach the PSU connectors (both the main ATX connector AND the auxiliary 4-pin 12-volt connector) to the motherboard, and try to boot the system. If it works, SHUT DOWN and UNPLUG THE PSU; then install ONE component (the floppy drive, for example), reattach the PSU, and reboot the system. If the system POSTs, shut down, unplug, and add another device. If the system does NOT complete the POST process, the last piece of hardware you installed is probably the culprit.

Take your time with this; be methodical, and make GOOD notes about the steps you've followed, so we can help you work through this problem...

Best of luck to you; keep us "posted" on your progress...

Posted on Jan 27, 2008

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Re: Fans runs but no post,no beeps.

I had same problem and more too. I tried several ways and i found at last. when i press start button evrey thing is fine but not boot. mobo chip had high temperature and HDD led was on. to boot i reset it. Then reset don!t solve problem. And i opened case and started to applay force on somthing. When i applied force on agp slot, HDD led gone off. I shutdown and restart. My mobo boot normally. Try this. Try this.

Pray for me! Thats all :D

Posted on Mar 07, 2009

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Re: Fans runs but no post,no beeps.

Try cleaer cmos try new power unplug cd roms use 1 ram when u boot up use less power to see

Posted on Jan 27, 2008

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4 Answers

After power on Fans are running but no Videosignal, no bios startup.

Could be 3 things Memory or CPU or Powersupply. are you getting any beeps if so how many, how long. try taking all the memory out and powering up see if it beeps if so try to put one stick of memory in at a time and see if it will boot. if you get no beeps with memory out check powersupply some PS's have a red switch on back for current input. switch back and fourth about 20 times uning a pen and set it to the right current for you location. put ram back in see if it will boot if not its trial and error of the PS and the CPU replacement and it still could be the RAM giving false readings. yea i know sounds like a ball of fun.

Feb 24, 2010 | Intel D915GAV Motherboard

2 Answers

The computer make a large beep sound whent it is turning on and never boot. I tried with different memory cards but did not work. help me please

Is the monitor working,
can you see the bios post
are you sure there is power
are the fans running
did it show any errors
blue screen
blue screen error

have you tried to enter safe mode and run system restore.

Feb 11, 2010 | Biostar U8668D (802700113338) Motherboard

2 Answers


Hi there.
Usually when the motherboard beeps there is a problem with some hardware or in most cases its the system memory that's at fault.
Get yourself a clean, soft, dry paintbrush, take the system memory out of the slots, clean the brass contacts on the memory sticks and also clean away any dust that may have built up on the slots that the memory goes into, after that blow any residual dust away and reseat the memory making sure its in nice and tight, then try to power up the computer.
Please post back with the results and if it still doesn't work please count the beeps and post back whether they are long or short.

Good luck and thanks for using FixYa!!

May 22, 2009 | Abit Fatal1ty AN8 SLi Motherboard

1 Answer

No post to bios on new pc build

FIRST....... Make sure you remove the stock thermal compund (pasty/sticky stuff) from the bottom of the heat sink as well as from the top of the cpu.........

Second APPLY some ARCTIC SILVER 5 compound-ust a thin coat of it over the top of the cpu......use an old credit card.....keep it ff the sides and bottom's important not to use too little tube will do anywhere from 3 to 5 CPUs...!!!
(stock thermal paste/thermal compunds......**** BADLY and can cause a cpu to burn up)

reseat (properly) the cpu and carefull

Now make sure you're 24 pin or 20+4Pin Power connectors are connected, as well as your fans..........disconnect all your SATA Devices, and remove everything but the video card , CPU, and fans.......Now it should post (if all your jumpers are set correctly...........

IF it still doesn't post, remove the video card and reboot.

If it doesn't beep at all......... You have one of 2 things.........A DEAD CPU, or a DEAD MOBO

Mar 19, 2009 | MSI P4M900M-L Motherboard

2 Answers

Computer will not boot up.

I have built several gamming computers, one with Asus and had good luck. What I do have is a power supply checker that I got from Tiger Direct that I use alot. To me a 450 watt PS sounds a little small . Sounds like it cant regulate the voltage, expecially the 5 volts. I have a master power supply (650 watts) that will hook up to any board or hard drive. I try it when I have this kind of problem. The only thing I dont like about Asus is that they have so many pins, so I would double check the pin settings.
Did the power supply come with the case.. If it did, change it. I have never had any luck with those. I really think they use 2nd hand ones for kits. Just my opinion GOOD LUCK

Nov 03, 2008 | ASUS M2N-E SLI (M2N-E SLI GREEN)...

1 Answer

Pc Seems to be dead wont load bios post moust doesnt work or keyboard or monitor

I have the same problem, the CPU fan spins, keyboard lights blink, no start up screen, or bios.
But, when I push a few times on the pc reset button, then the CPU fan is becoming still, the keyboard light are out and I can start the computer again in a normal way.
Can this one be a temporally solution for you too? Do you have any suggestion about?
I guess it can be an electricity dysfunction of a wrong fixed cable.

Oct 15, 2008 | Biostar P4M80-M4 Motherboard

1 Answer


You should only hear 1 beep. That 1 beep is power on self test, known as P.O.S.T.
That loud flat line sound (And I'm pretty sure about this), was you're CPU. Just because you ran & passed the stressed test is nothing compared to running the system under load? That's why when you put in you other memory nothing changed. If you hadn’t mentioned you clocked up the FSB I would have come to the same conclusion hearing the loud flat line statement.
Can you test the CPU in another board? That is about the only way to be sure it's not the CPU. Memory does not make that kind of sound. Memory makes short & long beeps.
You can try clearing the cmos/bios by going to pg. 2-18 in you're user manual. This will reset the bios back to default settings & cross you're fingers!

If I can be of more service, just post back & let me know how thing go.

Good Luck!


Apr 25, 2008 | MSI P6NGM-FD Core 2 Quad Socket 775...

1 Answer

New computer won't POST

have you tried different memory as no matter what the board says they don't like some memory .
also take the board out of the case and connect pwr supply.
cpu and fan ,video card , and 1 memory stick

no cables ,keyboard ,mouse or drives connected.
this is called bread boarding.
reset the bios jumper, then put jumper back.
and power up.

Mar 31, 2008 | Motherboards

1 Answer

K8NGM2 Mother Wont Power Up

I've seen situations similar to yours several times and they've always been a bad CPU.  Since you tried a new video card it's not that, I would suggest a new CPU.  Check on ebay, you can usually find used one's on there.

Oct 10, 2007 | ASUS A8N-SLI Motherboard

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