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HP ZD7000 laptop lights comes on for a second then nothing


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#1 AusJohn

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Posted 20 April 2013 - 07:03 AM

Hi all, I was given a HP zd7000 laptop in non working condition and would like to get it

going because of it's large screen and full keyboard.

It does not boot at all.

 

The battery was flat when I recieved it. When I plug in the power adapter all

the lights above the keyboard flash on for a second, the On button stays

illuminated as does the charge light on the front edge of the laptop.

The screen stays black, there are no sounds at all, the HDD doesn't spin up,

the cooling fans don't spin.

 

When I press the On button to turn it off it stays illuminated and won't turn off.

Even holding it in for 10 seconds doesn’t turn the On button light off.

When I remove the power adapter the On button stays illuminated though the

charge light on the front edge goes out, suggesting to me that the battery is

charging while the power adapter is connected, and the On button stays

illuminated for a while until the battery goes flat again.

 

Things I have tried are:

Removing the battery and AC power, holding down the On button for 10 seconds, to drain any power.

Plugging in the AC power without battery, the On button illuminates.

Removed AC power inserted battery, the On button illuminates.

Plugged in AC power, still the same.

Removed memory, swapped memory, tried both sticks one at a time in both

slots, removed HDD and tested as slave in desktop computer, seems ok, still the same.

Regardless of what I’ve tried, as soon as there is power to the laptop the On button illuminates and stays on until there is no power to feed it.

What I did notice was that the wireless card is missing, but I don’t see this having any effect on the problem

.

The On button is permanently illuminated as if it is stuck on, though I can hear and feel it click on and off.

Any suggestions would be greatly appreciated.

Cheers

 

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#2 caperdog

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Posted 20 April 2013 - 10:19 AM

Are you getting any other lights blinking (codes listed in link below)

http://h10010.www1.hp.com/ewfrf/wc/document?docname=c01443366&tmp_track_link=ot_recdoc/c01443463/en_us/c01443366/loc:3&cc=us&dlc=en&lc=en&product=84160

 

Check hard drive connection

 

hard reset as described here

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01443371&lc=en&cc=se&dlc=en&product=1148894



#3 AusJohn

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Posted 21 April 2013 - 06:39 AM

Thanks for the reply,

No blinking lights whatsoever.

HDD connection looks fine, have since removed the HDD.

Have tried hard reset, the On button stays illuminated as long as there is power going to the laptop, I have to remove the battery or it will stay on until battery power runs out.



#4 caperdog

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Posted 21 April 2013 - 06:54 PM

when you had the hard drive out did you try to start the laptop ? I am wondering if you strip it down will you get the blinking error codes. That may tell us if the motherboard has any sign of life. Remove DVD drive also and ram, see what happens.



#5 AusJohn

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Posted 21 April 2013 - 11:16 PM

I have tried starting it with the HDD out but no change.

I removed the DVD drive and RAM also as you suggested, still the same result, lights above the keyboard flash on for a second and the On light stays illuminated. No flashing lights/ blinking error codes.

I had also connected an external monitor but still no screen at all.

Doesn't look good does it. hehe

 

Cheers



#6 caperdog

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Posted 23 April 2013 - 03:11 PM

have you tested your power adapter to see if it is putting out the required voltage ? maybe it only makes enough to light the light and not power the motherboard.



#7 AusJohn

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Posted 24 April 2013 - 10:17 AM

  • No I haven't tested the power adapter, initially when I had the adapter plugged in it would charge the battery to the extent that I forgot to remove the battery one night and the ON light was still on the next day. So I'm assuming the adapter is working fine for the battery to hold charge for that long.
  • I was hoping that it might have been a quirk with that model laptop that a wire may have been squashed and bare against something shorting it out.



#8 caperdog

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Posted 24 April 2013 - 06:00 PM

Some things just give up the ghost. Not uncommon for a motherboard or CPU to go in a laptop, usually they have overheated.

Do you plan to go further and take it apart to visually inspect ? Maybe find that mystery wire ?

Or is it going to the boneyard ?



#9 AusJohn

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Posted 25 April 2013 - 07:34 AM

hehe........mate I think it may be going to the bone yard. I'm not to keen in disassembling it. We only have a couple laptop repair places around here and the prices I've seen them charge in the past I could almost buy a new laptop. So I'm abit reluctant to put it in for repair. It will probably lay around here for a few months while I decide what to do with it.

caperdog thanks for your help, I guess I'll leave it at that for now.

Cheers mate






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