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romieb69Flag for United States of America

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Laptop shuts off during POST test

Good evening experts....

When I turn on my laptop (cold) it barely starts the POST test and then shuts itself off immediately. No beep codes, no display ... nuthin! Could this be a problem with the processor? I suspect overheating problems have caused this to happen... now that I have it completely clean of any dirt I'm trying to figure out what part to replace first.
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romieb69
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John
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If a laptop shuts off that fast, check (if you can in the short period) that the fan is running.  If so, the starting point would be to remove the fan and see if you need new heatsink compound on the CPU (and possibly the GPU).

... Thinkpads_User
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Dr. Klahn

The symptoms point to either
a) severe thermal problem
b) a dead battery that is not being charged when the laptop is plugged in, and lack of power from the AC adapter, possibly due to a broken power jack

It is unusual for a laptop to thermal fault immediately on power up.

Both possibilities should be explored.  If it is a thermal problem, opening the case will reveal a wad of lint and hair clogging the tiny heat sink.  If cleaning the heat sink does not alleviate the problem, then a charging problem should be investigated.
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nobus
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i would start by opening the laptop, and clean it from dust - check all fans and vents
you may also need to replace the heatpaste on the cpu / video card
alternatively, try booting with all devices disconnected : cd  drive, peripherals, 1 ram stick, even without disk - you should see the POST screen
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John
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>>> would start by opening the laptop, and clean it from dust - check all fans and vents

That was already done according to the first post. .... Thinkpads_User
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edbedb
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romieb69
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ASKER

Looks like edbedb is correct on this.  

I took apart the machine and there was practically no thermal compound on the GPU or on the CPU.

The system was suprisingly clean! Very little dirt had built up even inside the fan assembly. The heat sink is a horrible design in my opinin. There's one copper tube going across both the cpu and the gpu. Come to find out there was actually a class action suit related to this poor design when I did a little more reading. Anyway I put some new compound on the cpu and put a cusom cut piece of copper on the GPU with some compound there (there was NO compound on the GPU at all and a slight gap between the copper heat sink and this chip). Using just the battery to test the system does the exact same thing. For grins I went ahead and put the MB back in the bottom chasis and reconnect the power and used the AC adapter. Again exact same thing.

I don't have the equipment to reflow the chipset so I'm gonna stop right there and see if I can get a replacement mother board. I'd rather do that than reflow the chipset anyway.

Thanks everyone for your suggestions and time on this matter.
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romieb69
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ASKER

http://www.youtube.com/watch?v=bnkQNmKauEc&feature=pyv&ad=5823851286&kw=compaq%20dv6000

Really good video on how to take apart this type of system and reflow the chipset
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edbedb
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I wouldn't get a buy another Mb, you will most likely end up with one that was repaired in the manner of the video you mentioned. Doing that works but won't last very long before it fails again.

I would send the board to one of the services listed on ebay that will do it properly. Here is one that will do it for $65 that should be okay.
http://www.ebay.com/itm/Hp-DV6000-Motherboard-Repair-AMD-443775-001-434722-001-/200660169646?pt=LH_DefaultDomain_0&hash=item2eb84733ae
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romieb69
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This really seemed like a good direction to go... Check out this MB description and see what you think about it (50 bucks)

NEW and SEALED condition. It has the second generation video chip, which offers superior reliability over the original release of these motherboards from the factory. HP Part#: 443774-001. This motherboard is one of the best you can buy for these series of laptops. It has a fire-wire port and two USB ports too.  It is a great replacement to use with your laptop computer.


http://www.ebay.com/itm/New-HP-Pavilion-DV6000-DV6700-Motherboard-443774-001-/220865943915?pt=Motherboards&hash=item336ca2d96b

What do you think?
R
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edbedb
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It looks good to me as long as you have a fire-wire port in the one you have now. otherwise you will have to remove the fire-wire connector from the new MB so it will fit.
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romieb69
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Very good point... I'll check tomorrow when I get back to work. I think it does but I'll double check. Thanks for all your help. Hopefully this will be helpful for other folks who have run into this problem with this series of HP's.
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