compaq evo N1000v problems (522 Views)
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Occasional Advisor
Peter_434
Posts: 10
Registered: ‎02-21-2005
Message 1 of 14 (522 Views)

compaq evo N1000v problems

Here's the situation: The laptop won't boot at all. When the power button is pressed, the monitor blinks for 1 sec. and then turns off, but the hdd is heard spinning. I tried removing the memory, hdd, optical drive, but still the same. Then I tried to use another cpu, but still exactly the same thing. Finally, I powered on the laptop without a cpu and voila, the monitor was working (but of course nothing was displayed on it). Now,
in both cases, neither the cpu fan nor the chasis fan work. Any ideas of what's is going on?

Laptop is a compaq evo N1000v
Occasional Advisor
Peter_434
Posts: 10
Registered: ‎02-21-2005
Message 2 of 14 (522 Views)

Re: compaq evo N1000v problems

I tried all the steps regarding the bios reset (removing of battery etc) without any luck. Also, when on ac, the power led is light and when the battery is inserted, the battery led is light as well, and the battery charges. Any help will be much appreciated.
Occasional Advisor
Peter_434
Posts: 10
Registered: ‎02-21-2005
Message 3 of 14 (522 Views)

Re: compaq evo N1000v problems

Anybody?
Respected Contributor
Matthew Bullion
Posts: 493
Registered: ‎10-30-2002
Message 4 of 14 (522 Views)

Re: compaq evo N1000v problems

Sounds like you have a mainboard problem.
Occasional Advisor
Peter_434
Posts: 10
Registered: ‎02-21-2005
Message 5 of 14 (522 Views)

Re: compaq evo N1000v problems

I changed the cpu, and by pressing the fn+f11 combination, I managed to get to the bios screen for about 10-15 sec. then the system shut down. After that It won't boot at all.
Valued Contributor
CA1211090
Posts: 165
Registered: ‎11-12-2004
Message 6 of 14 (522 Views)

Re: compaq evo N1000v problems

Peter,

I think you that have two damaged CPU's and probably mainboard now. Unnecessarily also warranty is void. Nevertheless I think there are three parts that could be replaced separately: DC-DC converter, mainboard or CPU. Because your laptop was working with both battery and power supply DC-DC converter
is excluded. CPU also was replaced so mainboard remains.

Kosma

Valued Contributor
CA1211090
Posts: 165
Registered: ‎11-12-2004
Message 7 of 14 (522 Views)

Re: compaq evo N1000v problems

BTW. There is no way to overheat your laptop in 10-15 s even if fan is not working. I believe that P4's are almost able to work without the heatsink. Of course this very extreme case but P4's will throttle immediately if temperature reaches a certain level, which is more than 90C. The heatsink was put on the CPU, isn't it? I have forgotten about a memory in the previous post. Did you try other memory dimm's?

Kosma
Occasional Advisor
Peter_434
Posts: 10
Registered: ‎02-21-2005
Message 8 of 14 (522 Views)

Re: compaq evo N1000v problems

Well I wasn't aware of the hp memory recall progam regarding this model. However this strange thing happens now:
I tried both processors on a socket 478 m/b and no one works. If I place them back on the laptop, one gives black screen completely and the other, lights up the screen without starting the laptop.
Now I am 100% sure that the replaced cpu is burnt. Actually I put the heatsink on it, but the fan wouldn't start. For 10-15 sec. as I posted earlier I managed to see the compaq boot logo, after that the system shutdown and the replaced cpu never worked again.
Occasional Advisor
Peter_434
Posts: 10
Registered: ‎02-21-2005
Message 9 of 14 (522 Views)

Re: compaq evo N1000v problems

If the laptop is power on but doesn't boot, should the cpu fan work or not?I believe the cpu fan is controlled via the bios, therefore if there's not boot then the fan shouldn't work. Is this correct?
Valued Contributor
CA1211090
Posts: 165
Registered: ‎11-12-2004
Message 10 of 14 (522 Views)

Re: compaq evo N1000v problems

I don't know what is the default setting in the BIOS concernig fan. But you may be correct.
It should work just after power on if "fan always on" option is set, othwerwise it doesn't.

Last chance in my opinion is to reset bios by (remove the RTC battery ?CR2032) and try other memory dimm with this CPU which powers on the display.
Anyway, I wouldn't try to repair it by myself. New mobo costs about 500 Euro, am I right?
Occasional Advisor
Peter_434
Posts: 10
Registered: ‎02-21-2005
Message 11 of 14 (386 Views)

Re: compaq evo N1000v problems

Well I already tried removing the rtc battery without any luck. Now if I turn the laptop on, without the processor, the monitor lights and no fan work at all. The same thing happens when I put the fan that was burnt (the one that I managed to start the laptop for about 10-15 sec.). The other cpu that came pre-installed with the laptpop only gives a black screen, but for a sec. when the power button is pressed, the monitor lights and I can hear other parts such the hdd to work. Wish I was sure that it's the m/b so that I could replace it, but I am really afraid that it's also a cpu problem.
Honored Contributor
Simon Poulton
Posts: 2,008
Registered: ‎03-22-2004
Message 12 of 14 (386 Views)

Re: compaq evo N1000v problems

Right then you probably have:
Two Fried CPU's
One Fried Motherboard and possibly DC-DC board
Occasional Advisor
Peter_434
Posts: 10
Registered: ‎02-21-2005
Message 13 of 14 (386 Views)

Re: compaq evo N1000v problems

Well, maybe the m/b isn't fried: When I press the eject button on the cd-rw, it ejects, and as I posted earlier, without a cpu installed, the tft lights up giving a dark blue image. I am thinking of trying another cpu and use an external cooling solution to see if I manage to enter the bios
Advisor
CA1253417
Posts: 14
Registered: ‎03-01-2005
Message 14 of 14 (386 Views)

Re: compaq evo N1000v problems

Try a dry boot
how?: remove ac adapter and and the battery then hold the power button for 90 seconds then connect only ac adapter and boot it should be ok. if no go try an external monitor to verify that your lcd is ok
good luck
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