HP dc7800p help.

[Kintarius]

[Crossposted]

This thing is driving me insane.

I finally managed to find the manual for the motherboard, and it has no definition for two beeps, which is what I'm getting.

Link to the manual: [Can't link URLs]

So what happened, and I realize I was an idiot in some parts.

I get this computer, pretty much as is. Put 4, 1g sticks of RAM in it, first thing. Install new, literally out of the package SATA 250g hard drive. Standard stuff. Get Win7 on it and it's working fine. Problem, the only PCI-E Graphics card I have is ooold and can't run any of my games. So I go out and buy an ATI HD 5770.

I fail to think of the power supply, and plug it in, and 30 seconds later (While I'm trying to figure out why my monitor didn't turn on) the system turns off and starts beeping. I don't know how many times it beeped then.

After finding the manual (It was beeping 4 times at this point) I find it's a power unit failure. I probably blew it, so I go out and get a new one today.

Plug it all in and...beep beep beep beep.

A lot of dicking around later, after I managed to blow the HD (I think) trying to see if I had the wires in the right places it actually turns on! (While the HD is unplugged, and I believe after resetting the CMOS).

It was on for a good minute. Functioning fine. Though the monitor wasn't plugged in atm. So I turned it off to plug in the HD to see if it was blown.

Beep beep.

I check the manual. No definition for two beeps. Help.

While I'm at it I want to know if I'm just wasting my time trying to upgrade this computer, is the new PSU (750w btw) incompatible? Is the card too strong for the motherboard? Or might it just be a loose wire or something else entirely?

I had it working on the old PSU for like 20 seconds when the GFX card was out, but it turned itself off and started beeping again.

It's currently beeping two times, still.

[Can't link URLs] for the general computer specs, tell me if you need more.

Thanks! :/

[Ratatapa]

Usually PCI-E cards need a power cable connected to it, so check that part.

2 beeps can also be memory, depending on the speed of those beeps

[Kintarius]

The Power unit and the 5770 are connected.

I checked the RAM and reinserted it and all that and it's back to a 4 beep Power Failure error.

This is running on barebones - GFX card, RAM, and PSU.

Oh and a motherboard of course.

[Killgannon]

oh god hp....i used to work on these things that failed on the assembly line and came back to me, their motherboards are horribly inferior to just about anything else ever, you need to step everything back to: your old video card, 1 stick of ram, and that's all and see what happens it could be that your new card's pci-e isnt compatible with the one on the motherboard and is thus causing an issue so i would check into that first

[Olo401]

HP computers are fuckin' horrible man.. I used to own one.

Anyways to help out I dug up your computer on HP's website.. This is the one I found but there were a couple others with similar model numbers so let me know if that's not the right one.