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New CPU, no display

L

libers93

New Member
Joined
Mar 28, 2024
Messages
12 (0.03/day)
Hi,

I'm looking for a bit of advice if possible please. I have bought a cheap PC, with the intention of streaming old games with an Elgato.

The PC was working fine when it arrived, albeit slow. The PC is a HP Compaq 8200 Tower PC with a CPU i3-2120 @3.3Ghz.

I've added a few bits of my own over the past few days, 2x8gb RAM, a USB 3.0 expansion card, extra SSD. Everything worked fine, but again, slow.

I bought a new CPU in an attempt to speed things up. An Intel® Core™ i7-3770K 3.5GHz, correct socket type etc. This arrived today and I have swapped the new CPU in.

The computer then wouldn't start. It would turn on, fans would run for 20 seconds, shut off, then 20 seconds later start again. This would continue until I pulled the power out. I then tried to put the CPU in but the same issue was occurring. I've also removed the RAM and put in the original 2x4gb back in.

I've read online about clearing the CMOS, so I took out the battery for a few minutes and plugged it back in and the PC seemed to run better. It now runs continuously, but nothing is being displayed. The fans are running quite fast and power is constant, but no display. The same now happens with either CPU in, old and new.

Any advice would be great appreciated!

Here are some pictures of the set up also:
 

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Ah, I missed that.
 
Reseat power connectors to mobo, verify your front panel connectors are in place, then:


Expand the section "Identify the desktop light or beep code"

Let us know if you get a code.

Edit: If no code disconnect non-os sata drives, plug in speakers and see if you receive noise from the OS starting.
 
Got a spare video card to try?
 
New CPU is much higher wattage than old. Maybe motherboard is burned out.
 
kilo said:
Reseat power connectors to mobo, verify your front panel connectors are in place, then:


Expand the section "Identify the desktop light or beep code"

Let us know if you get a code.

Edit: If no code disconnect non-os sata drives, plug in speakers and see if you receive noise from the OS starting.
Click to expand...
I've tried this, but seems to be giving same results. PC turns on, fan starts and then ramps up speed and just continues like that. No lights or beeps. Also still no display

Just pulled out the power and the computer began beeping. 3 beeps then a pause and then repeated. Also looks like a red light on the front flashing with each beep.

Is there any way to check for damaged parts on this, or is it worth cutting my losses and saying this computer is done for?
 
Could be dust or something in the lga. Maybe clean it out with canmed air and visually inspect it. Try reseat. But it looks like mobo blew up since both procs are giving you the error.
 
libers93 said:
Hi,

I'm looking for a bit of advice if possible please. I have bought a cheap PC, with the intention of streaming old games with an Elgato.

The PC was working fine when it arrived, albeit slow. The PC is a HP Compaq 8200 Tower PC with a CPU i3-2120 @3.3Ghz.

I've added a few bits of my own over the past few days, 2x8gb RAM, a USB 3.0 expansion card, extra SSD. Everything worked fine, but again, slow.

I bought a new CPU in an attempt to speed things up. An Intel® Core™ i7-3770K 3.5GHz, correct socket type etc. This arrived today and I have swapped the new CPU in.

The computer then wouldn't start. It would turn on, fans would run for 20 seconds, shut off, then 20 seconds later start again. This would continue until I pulled the power out. I then tried to put the CPU in but the same issue was occurring. I've also removed the RAM and put in the original 2x4gb back in.

I've read online about clearing the CMOS, so I took out the battery for a few minutes and plugged it back in and the PC seemed to run better. It now runs continuously, but nothing is being displayed. The fans are running quite fast and power is constant, but no display. The same now happens with either CPU in, old and new.

Any advice would be great appreciated!

Here are some pictures of the set up also:
Click to expand...
It's not always about the correct socket type with office pre-built pcs from hp or dell because sometimes they limit the cpu compatibility in their BIOS micro-code even in the same generation to prevent customers from getting too big of an upgrade due to low end vrms on their motherboards or low end smps or low end coolers. So you definitely need to check if that specific pc model supports an upgrade to a higher core cpu like the one you are trying. There are bound to be workarounds but you would need to search the net for them. I remember Linus (from LTT) doing a similar video on a pre built pc. I maybe wrong in your case but it's something manufacturers have done in the past.
 
Tech_fanatic said:
It's not always about the correct socket type with office pre-built pcs from hp or dell because sometimes they limit the cpu compatibility in their BIOS micro-code even in the same generation to prevent customers from getting too big of an upgrade due to low end vrms on their motherboards or low end smps or low end coolers. So you definitely need to check if that specific pc model supports an upgrade to a higher core cpu like the one you are trying. There are bound to be workarounds but you would need to search the net for them. I remember Linus (from LTT) doing a similar video on a pre built pc. I maybe wrong in your case but it's something manufacturers have done in the past.
Click to expand...
If this is the case, do you think the motherboard is done for now that the old CPU won't work?
 
libers93 said:
If this is the case, do you think the motherboard is done for now that the old CPU won't work?
Click to expand...
What's exactly happening when you put in your old cpu. For most part motherboards will a fail safe to prevent itself from frying but not all components on the mb are protected. Even a blown cap can prevent the mb from pushing the voltages to the cpu or other components. Age is also a thing u know. Components are more susceptible to failure after a certain age (passive comps like electrolytic caps are the most susceptible to aging in a mb).
 
Tech_fanatic said:
What's exactly happening when you put in your old cpu. For most part motherboards will a fail safe to prevent itself from frying but not all components on the mb are protected. Even a blown cap can prevent the mb from pushing the voltages to the cpu or other components. Age is also a thing u know. Components are more susceptible to failure after a certain age (passive comps like electrolytic caps are the most susceptible to aging in a mb).
Click to expand...
Just exactly the same thing as when I had the new CPU in. Power PC on, no display at all. Fans runs then gets faster and faster and just keeps running. I ran fine before I tried to put the new CPU in, but now it won't display anything
 
There's also a possibility you're over tightening the cpu heatsink if everything else physically is fine.
 
Did you reset CMOS when you put the old CPU back in? I know you mentioned it but wasn't sure if that was after the new one was in.
 
Business systems such as these are very particular about the processors that they will start. While there are no technical limitations regarding chipset, you would need a proper BIOS and one simply doesn't exist. The fastest CPU this system should reasonably support is the Core i7-2600 (non-K).

I'd make sure that the CMOS was reset and then if that doesn't work, take a look at the socket again and see if there aren't any debris or thermal paste on the LGA. If the latter is true, contact cleaner spray does the trick, do NOT use a brush, towel or q-tip on the LGA or you WILL destroy your motherboard
 
Pictures of CPU socket and CPU installed

Video Unavailable

This video is unavailable.
streamable.com streamable.com

Video of start up. Also worth mentioned PC boots straight away as soon as power cable is plugged in. The fan runs constantly at the same speed as the end of the video until I hold the power button to switch off
 

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Last edited:
libers93 said:
Pictures of CPU socket and CPU installed

Video Unavailable

This video is unavailable.
streamable.com streamable.com

Video of start up. Also worth mentioned PC boots straight away as soon as power cable is plugged in. The fan runs constantly at the same speed as the end of the video until I hold the power button to switch off
Click to expand...

There are debris/bits of thermal paste in the pins I've circled, they might be covering some of the voltage sense pins and causing the system not to boot. You need to clean that out. Isopropyl or contact cleaner spray (heavily preferred) - but make sure not to bend any pins or you will damage the motherboard. In the absence, try scrubbing that out with a toothpick but VERY slowly and VERY carefully so you don't damage the LGA

1711663980789.png
 
Dr. Dro said:
There are debris/bits of thermal paste in the pins I've circled, they might be covering some of the voltage sense pins and causing the system not to boot. You need to clean that out. Isopropyl or contact cleaner spray (heavily preferred) - but make sure not to bend any pins or you will damage the motherboard. In the absence, try scrubbing that out with a toothpick but VERY slowly and VERY carefully so you don't damage the LGA

View attachment 340960
Click to expand...
That's a good tip

Try and get Isopropyl alcohol/Isopropanol over 90% when cleaning contacts and/or PCB. Can usually be found in pharmacies and big af grocery stores. Dries out somewhat faster, removes thermal paste, dirt, etc and less water
 
I've got isopropyl alcohol and toothpicks. I've had another look and tried to clean those bits out. Though when looking closer, it looks like all the pins I've circled are bending towards the way the arrow I've drawn is pointing. Could have been from the pressure of the CPU clamp that holds it in place. What do you think? Can those LGA sockets be replaced?

More photos, sorry, its difficult to get a good angle
 

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libers93 said:
The PC is a HP Compaq 8200 Tower PC
Click to expand...

My main machine at home is an HP Compaq 8000 (Core 2) and is faster than I even need.
 
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