having hard time with rebuilding HP Compaq 8200 Elite #PLEASE HELP

[adarc8]

the pc full name is HP Compaq 8200 Elite Small Form..
it has a weird motherboard with his own power supply which make it impossible to connect psu..
it has i5 2400 with 8 gb ram so i wanted to add gpu for gaming..
my goal was to sell the mother board and buy new one like H61 or Z77. but i understood its impossible, and i also saw a video which a person shows that it posible to connect the GPU to diffrenet PSU. which is excactly what i need because the weird psu is only 160W and has no extra power cable for my gpu.. so i started to rebuild the pc.. i put the mother board in the case and closed it with screws. put the CPU, put the cpu cooling, put 4 sticks of ram, and then connected the power supply with the weird tiny white connect, a normal 6 pin, and a normal 4 pin. and then connected the motherboard to the case. brown to brown, black to black, blue to blue, green, yellow, and white... put the hdd power in his 4 pin power connect and thats it finish right? i guess no because the pc doing nothing while turning on, i played with cable and managed to get to a 2 situation.. once when theres red light and beep beep, and the other is kind better, i played with 6 pin connect of the psu and suddenly the pc came back to live, but no screen.. and after 1 min the psu fan starts full power
exactly what shown in this video:
https://www.youtube.com/watch?v=tigEseEZ8xk (time 1:10)

im so hopeless, dont know what to do.. it must be something with the power, and cable.
before i did all this switch the pc works fine so its really rare to think about the idea that maybe one of the items burned or something...

 

[the nerd 389]

From what I can tell, you're trying to use two PSUs at the same time in a single computer. One PSU has the connectors necessary to connect the motherboard, and the other provides enough power for the GPU. This is a terrible idea. I can't even begin to cover the technical pitfalls involved with tying two PSUs together.

There's a reason that redundant PSUs have so much circuitry sitting between the PSUs. Needless to say, hooking two PSUs directly together can easily destroy both PSUs, and anything that's connected to them.

It also isn't clear what you mean by "case". The case doesn't have any wires (other than for the power switch/front panel). Please clarify what you've done.

 

[adarc8]

From what I can tell, you're trying to use two PSUs at the same time in a single computer. One PSU has the connectors necessary to connect the motherboard, and the other provides enough power for the GPU. This is a terrible idea. I can't even begin to cover the technical pitfalls involved with tying two PSUs together.

There's a reason that redundant PSUs have so much circuitry sitting between the PSUs. Needless to say, hooking two PSUs directly together can easily destroy both PSUs, and anything that's connected to them.

It also isn't clear what you mean by "case". The case doesn't have any wires (other than for the power switch/front panel). Please clarify what you've done.

first of all when i say case, yes i mean to the fan and power switch.. it has 5 cables so i think i can call it case wires..
about the psu, no im not using 2 psu, my goal is to do that but first i want to see that my pc is alive.. for now im trying to get it on with his normal psu.. didnt add my gpu or my psu.. im just trying to get it work, and then i will consider the 2 psu for the gpu thing..
right now im stuck cause my pc was okay 2 days ago, then i started to take everything out cause i was about to sell the motherboard, then i understood its wrong and build it again. i have no idea why its not working and thats why i posted here for maybe someone can help me with that..

thanks for helping

 

[USAFRet]

The problem is...

the pc full name is HP Compaq 8200 Elite Small Form..

Dump that case, dump that motherboard....
Basically, build a whole new system.

Prebuilt Dell/HP/etc are not really upgradable.
SFF even less so.

That PSU can't power anything reasonable, and you can't put a different PSU in the case, or connect it to that motherboard.

Sell the HP thing for whatever pittance you can get for it, and start over.
It is not worth trying to build upon.

 

[adarc8]

The problem is...

the pc full name is HP Compaq 8200 Elite Small Form..

Dump that case, dump that motherboard....
Basically, build a whole new system.

Prebuilt Dell/HP/etc are not really upgradable.
SFF even less so.

That PSU can't power anything reasonable, and you can't put a different PSU in the case, or connect it to that motherboard.

Sell the HP thing for whatever pittance you can get for it, and start over.
It is not worth trying to build upon.

ive seen videos on youtube wheres ppl manage to make the diffrent psu power the gpu and makes this junk to a not bad gaming pc

 

[USAFRet]

ive seen videos on youtube wheres ppl manage to make the diffrent psu power the gpu and makes this junk to a not bad gaming pc

This is true. We see lots of things on the u tubers.
However...the time and cost of trying to make this HP POC into something reasonable would be better used in just buying something reasonable.

Just because it looks like a PC, does not make it a good PC.

And what you don't see on the u tubers is the 10 times they tried it before, when the system melted down into various combinations of a smoking pile of junk.

 

[the nerd 389]

It sounds like something is shorted out. Go back over all of the components that you removed, and make sure that they're all screwed in properly.

The other item I noticed is that you removed the CPU cooler. Did you apply new thermal paste when you put it back? If you didn't, that's often enough to destroy a CPU.

 

[adarc8]

It sounds like something is shorted out. Go back over all of the components that you removed, and make sure that they're all screwed in properly.

The other item I noticed is that you removed the CPU cooler. Did you apply new thermal paste when you put it back? If you didn't, that's often enough to destroy a CPU.

the thermal paste was already on the cpu and it wasnt dry(like when i touched it, my finger had thermal paste...) so i dont see a reason to put more..
ive played some more with cable and i think i now burned it cause i smell fire from motherboard after was a tiny boom sound..

 

[SkyNetRising]

i think i now burned it cause i smell fire from motherboard after was a tiny boom sound..

Well done. Time to get a new pc. 😉

 

[the nerd 389]

It sounds like something is shorted out. Go back over all of the components that you removed, and make sure that they're all screwed in properly.

The other item I noticed is that you removed the CPU cooler. Did you apply new thermal paste when you put it back? If you didn't, that's often enough to destroy a CPU.

the thermal paste was already on the cpu and it wasnt dry(like when i touched it, my finger had thermal paste...) so i dont see a reason to put more..
ive played some more with cable and i think i now burned it cause i smell fire from motherboard after was a tiny boom sound..

You MUST replace the thermal paste any time the cooler is removed. Always, and without exception.

 

[adarc8]

It sounds like something is shorted out. Go back over all of the components that you removed, and make sure that they're all screwed in properly.

The other item I noticed is that you removed the CPU cooler. Did you apply new thermal paste when you put it back? If you didn't, that's often enough to destroy a CPU.

the thermal paste was already on the cpu and it wasnt dry(like when i touched it, my finger had thermal paste...) so i dont see a reason to put more..
ive played some more with cable and i think i now burned it cause i smell fire from motherboard after was a tiny boom sound..

You MUST replace the thermal paste any time the cooler is removed. Always, and without exception.

umm, is the cpu has a thermal sensor? i think u r wrong, i think that its not logic that the cpu can recognize if it has enoguh thermal paste or not, and if not then give an order to the motherboard to not turn the pc on.. lol

 

[the nerd 389]

It sounds like something is shorted out. Go back over all of the components that you removed, and make sure that they're all screwed in properly.

The other item I noticed is that you removed the CPU cooler. Did you apply new thermal paste when you put it back? If you didn't, that's often enough to destroy a CPU.

the thermal paste was already on the cpu and it wasnt dry(like when i touched it, my finger had thermal paste...) so i dont see a reason to put more..
ive played some more with cable and i think i now burned it cause i smell fire from motherboard after was a tiny boom sound..

You MUST replace the thermal paste any time the cooler is removed. Always, and without exception.

umm, is the cpu has a thermal sensor? i think u r wrong, i think that its not logic that the cpu can recognize if it has enoguh thermal paste or not, and if not then give an order to the motherboard to not turn the pc on.. lol

[strike]The CPU usually only down clocks itself. If your computer shuts off from the CPU temps, it's usually not because of a safety feature. It's because the CPU can't function above certain temperatures and starts making mistakes, and that crashes the software.[/strike]
UPDATE: See below. I stand corrected.

 

[USAFRet]

It sounds like something is shorted out. Go back over all of the components that you removed, and make sure that they're all screwed in properly.

The other item I noticed is that you removed the CPU cooler. Did you apply new thermal paste when you put it back? If you didn't, that's often enough to destroy a CPU.

the thermal paste was already on the cpu and it wasnt dry(like when i touched it, my finger had thermal paste...) so i dont see a reason to put more..
ive played some more with cable and i think i now burned it cause i smell fire from motherboard after was a tiny boom sound..

You MUST replace the thermal paste any time the cooler is removed. Always, and without exception.

umm, is the cpu has a thermal sensor? i think u r wrong, i think that its not logic that the cpu can recognize if it has enoguh thermal paste or not, and if not then give an order to the motherboard to not turn the pc on.. lol

No, that's not the way it works.
The CPU will run and heat up to whatever the cooling situation allows.
A poorly connected cooler, or a cooler with bad or no thermal paste, may allow the CPU to heat up to its thermal limit.
At that point, it will simply throttle down to keep it from melting itself.

It does not detect the presence, absence, or quality of the parts.


Now...as for why you need to clean and replace?
Once you run it for more than a day or two, the paste will become a bit hardened.
Take that cooler off, and of course there will be paste still on it.
However...you cannot get the same seal as it was when it was first applied.
And that is ALL the paste does...fill in the micropits between the CPU face and the cooler face.

Reusing old paste will not seal nearly as well as an original application.

 

[the nerd 389]

The only other thing I can think of that could have gone wrong is that a power connector may have been plugged in incorrectly.

I don't know if that motherboard has a mechanism to prevent you from plugging the main flat connector in backwards.

UPDATE: With this comment, I'm assuming that you didn't drop a screw under the motherboard, or otherwise short anything out with non-computer parts.

 

[adarc8]

The only other thing I can think of that could have gone wrong is that a power connector may have been plugged in incorrectly.

I don't know if that motherboard has a mechanism to prevent you from plugging the main flat connector in backwards.

UPDATE: With this comment, I'm assuming that you didn't drop a screw under the motherboard, or otherwise short anything out with non-computer parts.

wow what???
i just opened the motherboard to check that and there was a screw there.. now i connect everything togethe but its still not working. is it possible that i fixed the problem but now its not working cause i burned it few hours ago?

 

[USAFRet]

wow what???
i just opened the motherboard to check that and there was a screw there.. now i connect everything togethe but its still not working. is it possible that i fixed the problem but now its not working cause i burned it few hours ago?

"ive played some more with cable and i think i now burned it cause i smell fire from motherboard after was a tiny boom sound.."

This indicates you killed something, probably the motherboard.