Netbook doesn't boot on startup, fan turns off

Hello, this netbook KAV60 (Packard Bell) I've been trying to revive for a client just doesn't want to humor me.

I have replaced a damaged internal power plug, but still I can't get it to properly turn on.

Here's what it does: I turn it on, with battery or plugged to a socket, the fan starts working, then after about 3 seconds the fan turns off but the power led stays lit. It's almost as if the netbook entered standby immediately upon startup.

I've tried removing parts, disconnecting the monitor, nothing changes.

So, can some of you guys give me any ideas? Thanks.
Daniele BrunengoIT Consultant, Web DesignerAsked:
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Emmanuel AdebayoGlobal Windows Infrastructure Engineer - ConsultantCommented:
When you take the parts out, i.e memory, etc, was there any beeps?

If there are no beeps, the systemboard might have gone. If it is still on warranty, I will call for support/replacement.

Regards
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ZamZ0Commented:
Did you touch the CPU? What you explained reminds me of a CPU that isn't seated properly.

Are you sure you put everything back where it goes?
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Daniele BrunengoIT Consultant, Web DesignerAuthor Commented:
I didn't touch the cpu or the motherboard, there was no need for that. I unplugged the keyboard, the trackpad and the power button and then plugged them back.

So I'm sure everything is back where it goes.

Anyway, there are no beeps whatsoever, even with no ram.
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ZamZ0Commented:
What exactly did you replace? Are you positive it was the right replacement piece? Was it used? Are you positive the replacement was done properly?
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Daniele BrunengoIT Consultant, Web DesignerAuthor Commented:
I replaced the inner cable connecting the motherboard to the power plug. Yes it was the right replacement piece, actually I've got two of them and the same thing happens with both.

One is used, one is new.

The replacement was done properly, it's at least the 50th laptop I've disassembled and reassembled this year so yes I'm positive.

When I received the laptop the power plug was totally caved in with a couple of disconnected wires too. So I wasn't able to test it out until I replaced the plug.
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JohnnyCanuckCommented:
You've probably already done this but remove the battery and the hard drive and test.  Also, try reseating the RAM.  From your description of the original problem the laptop may have been dropped possibly cracking the motherboard at a critical area or otherwise loosening or breaking a component.
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Daniele BrunengoIT Consultant, Web DesignerAuthor Commented:
Thanks, I've already tried that out. I also used other compatible Ram, nothing changes.

I can't see any physical damage on the motherboard though, there's quite a lot of space between it and the plug's lodging.
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ZamZ0Commented:
Ok so when you say you replaced the internal power plug do you mean the dc jack or the power supply? If you replaced the dc jack it may be that the power supply is bad. If you replaced the power supply it might mean that the dc jack is bad. When youre doing youre testing have you tried with both ac power and a (charged) battery?
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Daniele BrunengoIT Consultant, Web DesignerAuthor Commented:
I've tried with a battery, with 2 power supplies and with 2 dc jacks. Nothing changes.
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Emmanuel AdebayoGlobal Windows Infrastructure Engineer - ConsultantCommented:
As i have mentioned from the begining, it seems that the motherboard is goneand need replacement.

Regards
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Daniele BrunengoIT Consultant, Web DesignerAuthor Commented:
That's what I feared, I just needed to hear it from someone else I guess. Thanks.

It's not on warranty though, I'll advise my client to buy something else and I'll recover his data.
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