Will monitor not work, if CPU is bad?

Smitty

Smitty

New Member
Hi everyone, new here, and am looking forward to hanging around.


HP a445w

I have done everything possible to fix this thing, but no success.

At startup, it just a black screen, and the monitor light never changes to green, and the CPU fan runs full blast.

I've changed hard drives, RAM, and Power supply from another system that I know everything works in (cause I'm typing on it now).

I'm thinking the CPU is bad, so I removed it, and it was damn near welded to the heat sink. The thermal compound was completely dried out.

My question is....if the CPU is fried, would the monitor never come on?



Thanks in advance.
 
If the CPU is bad, the monitor (well video card) would not work. However, I suspect the problem is elsewhere. From what you've changed, I guess about all that's left is the motherboard and CPU. Have you tried removing the motherboard and trying it outside the case, or just reseating it to confirm it wasn't shorting out anywhere.
 
Sorry, I forgot to mention, but I have tried resetting the BIOS several different ways.

  • By removing the battery for a long period of time
  • And doing the jumper thing

Neither worked:confused:

Motherboard is P4SD-LA


I have not removed the motherboard from the case.
 
There are two flavors of that MB according to HP. One with integrated Video and one without.

Which one do you have?
 
Sounds like a video problem and not cpu

However the cpu problem doesnt sound good either

Start by cleaning off the processor and heatsink with a rag and rubbing alcohol

Replace the thermal paste (rice sized grain in the middle) then, replace heatsink. Then bootup the pc and see if anything has changed.
 
My old Compaq did the same. CPU fan runs full speed at boot, clearing CMOS did nothing. I ended up having to get a new computer.

Pull out all components you can (even RAM) except the PSU, of course, and then try booting. If it doesn't give any beeps, the motherboard or CPU is shot, more likely the board.
 
schw32m said:
Okay.. here is the MB in that machine http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&dlc=en&cc=us&docname=c00022505

It supports single or duel channel memory configs so be sure you have the memsticks on the board in the correct order.

Or for test purposes take all other cards out, put one stick in DIMM1 and follow the CMOS clearing directions, connect the monitor to the onboard vid port and see if the BIOS will come up.
Click to expand...

I'm sure it's not the memory, but I will remove 3 out of the 4 sticks, and try clearing the CMOS that way. Hopefully that will work, lol

Thanks for the help guys ;)
 
Well, I did that. I removed my 3 other RAM sticks, and left DIMM1 in place. I removed the power cord, drained all power, moved the J19 jumper, fired it up, then down, drained power, and put J19 back in it's original place.

Fired it up, nothing.


However, maybe this might be of interest:

I put the CPU back in place without the cooling fins, and when powering it on, only ran for about 5 seconds before the CPU was so hot that I couldn't even touch it.
 
Smitty said:
I put the CPU back in place without the cooling fins, and when powering it on, only ran for about 5 seconds before the CPU was so hot that I couldn't even touch it.
Click to expand...

This is NOT a good idea

Now im starting to wonder if you fried your chip
 
^ The integrated heatspreaders on most CPUs prevent that, it will heat up fast but not fast enough for the sensors not to pick it up and do a core shutdown before it overheats. I tried this with my Sempron; it actually took several seconds before it got even warm.
 
Smitty said:
I'm thinking the chip is bad anyway.........
Click to expand...

Have you tested all the components individually in known working systems? IE. Ram, PSU, MB, CPU chip.

If you do all that then you should be able to identify which component is at fault.
 
I don't have another PC that is compatible with everything. I did try the power supply though, so I know for a fact it's not the PS.

The only thing I can think of doing is trashing it, or replacing piece by piece
 
You never want to trash a whole computer. If nothing else, take out the parts that you know are working and replace the rest. It's much more economical, and a decent opportunity for an upgrade.
 
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