Question about HP Pavilion a800n (PP163AA) PC Desktop

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HP Pavilion a800n wont boot up

So i was trying to change out the ram for a better on. while doing that i decided that i was going to clean out the insides, mainly cause its never been done. also while doing this, i took out the processor to clean it out aswell. when i put it all back together, and powered it up, the fans were running and in about 5 seconds it shut down. it didnt even get to the BIOS and didnt even kick on the monitor.

after shutting it down it wouldnt turn back on untill after i unpluged it and waited for a really small green light to flash on the power supply. then plug it in and try again. but nothing changed, not even after putting everything back the way it was before i took out the ram.

all i need to know is, how can i just get it to run?!?!?! its been stressing me out for about 4 hours now and i just have no clue on what i can do.

i think it may be a processor issue because of taking it out and putting it back in. but i have no idea. HELP ME!!!

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  • side501 Dec 25, 2008

    i dont hear any beeping. it dosnt even do that

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I think the processor is the problem, too.
Does the board beep? How is the beep?
Just try to remove it again. Make sure everything is placed properly when you put it back.
Also try to put old RAM back, to see if it is the new RAM is OK.

Posted on Dec 25, 2008

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It is possible you "Fried" the processor or something else. all it takes is a small static charge to kill those delicate circuits. dont wanna be all doom and gloom. i would strongly suggest you take this to a pro that can test all the hardware and find out. hopefully it's just a problem with your power supply. please let me know

Posted on Dec 25, 2008

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How do i reset my hp pavilion a800n to factory settings?


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So i was trying to change out the ram for a better on. while doing that i decided that i was going to clean out the insides, mainly cause its never been done. also while doing this, i took out the...


Make sure the cpu is seated properly. It should only go in one way. Also make sure you have applied a good thermal paste between the cpu & heatsink. Check and reseat RAM. Then try rebooting. Hope this helps.

Dec 25, 2008 | HP Pavilion a800n (PP163AA) PC Desktop

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Aug 08, 2008 | HP Pavilion a800n (PP163AA) PC Desktop

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Dec 31, 2007 | HP Pavilion a800n (PP163AA) PC Desktop

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HP pavillion a800n pc wont' boot up..I get nothing...


After much trial-and-error, I finally figured out the solution for this common issue with certain HP Pavillion models. It turns out to be a design flaw with the front-panel memory card reader. Somehow the card reader's firmware gets scrambled, and it prevents the computer from booting. You can test this on your machine by temporarily disconnecting the card reader cable at the motherboard header. Voila - I'll bet you $1 that your computer will now boot!

The solution is buried deep inside this HP tech support document. The card reader firmware needs to be reset.

Here\'s how to fix it once and for all:

1) With the computer power unplugged (duh), open up the case & disconnect the card reader cable at the card reader itself - NOT the end that connects to the motherboard header. Make sure the cable end is not touching any metal components before proceeding to step 2 (another duh).

2) With the cable still disconnected, fire up the computer. The tech support doc says to let it boot into Windows and stay there for about 5 minutes.

3) Shut the computer down and reconnect the cable to the card reader.

4) Turn your computer back on - your memory card reader will work and, most importantly, the computer will no longer hang at POST!

I suspect that when you fire up the computer without the cable connected, the card reader is designed to reset its firmware by grounding out through the case - sort of like a CMOS Reset jumper on a motherboard.

I hope this solution is helpful to others.

best,
JohnB

Oct 31, 2007 | HP Pavilion a800n (PP163AA) PC Desktop

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