Asus N53SV Power Problems

I have a Asus N53SV laptop.  I sent the machine back to ASUS once after it would not power on.  They replaced the DCinBD as noted on their documentation returned with the laptop.  This was approximately two months ago and all has been well.  Recently the laptop wouldn't power on.  I left it for a while then went back to turn it on again and it came on.  Once in the OS the machine works as it should.

Are there any known issues with this particular device?  I'm using a Targus universal power adapter.  The power adapter has the same specifications as the OEM.  19v 2.5A.

Thanks in advance.

I'm hoping not to have to send it to Asus again.  Especially if I can't recreate the problem on queue.
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1namylnAsked:
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CallandorCommented:
Try to establish under what conditions it boots or not.  If it won't boot after being off for a while, but will boot after it has been on or shut down recently or attempted to power on, these are classic symptoms of bad capacitors, usually in the motherboard (for desktops, they can also be in the power supply).  What happens is there isn't any charge in the capacitors, and the boot process fails; after charging them, there is enough residual charge to boot the system.
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nobusCommented:
you can also remove devices, like extra ram stick, CD drive extra cards, peripherals
each can block the unit from booting
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1namylnAuthor Commented:
What I'm going to try for now is buy a oem power adapter. These problems occured with not using an original adapter.  Just a guess.
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nobusCommented:
removing the peripherals does not cost a dime, and is a quick diag - but it's your choice..
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1namylnAuthor Commented:
I will certainly try removing things also. Thank you for the suggestion. This is a machine I'm repairing for a client so I'll have to pass that along as they need it back ASAP.
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nobusCommented:
post results !
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1namylnAuthor Commented:
I have my OEM adapter and all seems to be well now.  I did notice that the machine would not run on battery.  I had to pull the battery and hold the power button down.  After doing this that issue was resolved.

So far with the new adapter everything looks good.
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nobusCommented:
what are the specs of the new adapter? V and A ?
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1namylnAuthor Commented:
Input: 100-240V ~2.5A, 50/60Hz
Output: 19V~6.3A, 120W
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nobusCommented:
not quite the same hey :  
old :  The power adapter has the same specifications as the OEM.  19v 2.5A.
new : 19V~6.3A, 120W

it was simply grossly underpowered.....
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