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HP Laptop Dead

rkoenn

rkoenn

Senior member
I have an HP laptop I bought about 1.5 years ago. After buying it I replaced the Sempron CPU with a dual core CPU and the machine ran fine for a year or so. About a month ago when I turned it on I got a blank screen. While doing a repair on a friends laptop shortly after I switched the memory modules from his for mine and my HP fired up. It ran for about a week ok and then repeated the startup problem again. I tried switching memory with other modules from my sons machine with no luck. It is currently dead and nothing I have been able to do to this point has fixed it.

My question for any experts is along the lines of is it highly likely that the CPU has failed? This is my first thought as I believe the memory controller is embedded in the AMD CPUs. If that is the likely culprit then I plan on buying another off eBay and giving it a try. But before I do that I was looking for any advice as what would be the most likely problem. I am also going to disassemble the machine again and do a visual inspection of the CPU for any obvious problems but don't expect to find any. If it was a desktop I could resolve this problem rather quickly but for a laptop I am obviously going to have great difficulty as I can't really change components or discretely check the parts.

Thanks in advance.
 
What model?

Does it appear to be powering up with the lights above the keyboard coming on and fan spinning, just no display?
 
Depending on if you can isolate the problem, the best thing to do could be to part it out on ebay and get another *non HP laptop.
 
Lanyap said:
What model?

Does it appear to be powering up with the lights above the keyboard coming on and fan spinning, just no display?
Click to expand...
It is powering up, i.e. fans running and other such things. It does flash the caps lock light in a 3 flash sequence. I have looked that up on the web and not been able to pin anything down about it. What makes me think it is likely the processor is that I did change it out and also that it initially worked after that first memory changeout. If it was a hard motherboard failure I would suspect it would never have worked with the different memory at all.

And it is a 6735s model.
 
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Gotta be an HP Compaq 65xx or 67xx. Same thing happened to my neighbor's 6515b after I upgraded the Sempron to a Turion 64 X2. I did the same upgrade to his friend's laptop of the same model, but its still chugging along OK.

Didn't think about checking the RAM but I'm going to swap out the memory. I upgraded that also to 2GB from 512MB. Its not the LCD inverter.
 
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tcsenter said:
Gotta be an HP Compaq 65xx or 67xx. Same thing happened to my neighbor's 6515b after I upgraded the Sempron to a Turion 64 X2. I did the same upgrade to his friend's laptop of the same model, but its still chugging along OK.

Didn't think about checking the RAM but I'm going to swap out the memory. I upgraded that also to 2GB from 512MB. Its not the LCD inverter.
Click to expand...

Did the upgraded machine run initially before it died? Mine ran fine for about a year before it went dead. My son used it for a week from his bed after and operation in August and I used it a few times after that. Than I powered up one day to a blank screen. A month later the initial memory swap got it working for about a week. Then I was using it and as I recall, it locked up while running. After a power down it went blank. I think it actually came up briefly once after that and since then, even with 3 different types of memory, it is dead. I think I will end up getting another Turion off eBay, I've seen a tested one for about $25, and hope that might be it. Before I do that I am going to open it all up and resocket the CPU to see if that makes any difference, as well as visually inspecting it. I figure I can always get back most of my investment in the replacement Turion if I have no luck.
 
It ran fine for about four or five months after the upgrade. I did both laptops at the same time back in the summer. It shut down or locked hard a couple times before getting no display. It does seem to get half-way through POST but it halts at some point. Hard drive light comes on briefly a few times then goes off, not remotely enough activity to be consistent with an OS loading/booting.
 
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