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Scotsman52
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Message 1 of 4
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DC power fails when plugging in power pack

HP Recommended
Pavilion 27 All in One
Microsoft Windows 10 (64-bit)

Hi i have a HP all in one its a 27 -r104na.

 

My problem is that even when I plug in the DC power without even switching on the unit the power pack cuts out.

Its not the power pack as it has been tested on another similar device and that works find.

As soon as you plug in into the unit the green LED goes out. it looks as if there is a short circuit on the motherboard itself. has anyone else had this type of issue. The unit is just a year out of warranty, I cant see anything burnt or blown on the motherboard and the DC connector looks clean inside, no signs of broken metal pieces etc.

3 REPLIES 3
Grzwacz
Level 12
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Message 2 of 4
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HP Recommended

Hi,

 

I would agree you have a motherboard (MB) issue or a component or peripheral connected to the MB or the PC.

 

Not too many options available to effect a quick repair.

 

Try to verify and fix the short (qualified technician) if possible, buy a used replacement MB, contact HP Support for service, or buy a new PC.

 

Regards

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Scotsman52
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Message 3 of 4
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HP Recommended

Hi.

yes tried that i removed all the external cables going out to all the attached devices, still the same issue. I expect it the Zenor Diode that protects the incoming supply from going over 21V but not sure where that is located, do you know if we can get the circuit diagram and the board layout from anywhere, or how we can get a price from HP for a replacement part.

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Grzwacz
Level 12
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7,153 5,668 679 1,459
Message 4 of 4
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HP Recommended

Hi,

 

I don't have access to a schematic or a diagram.

 

Check HP Part Surfer (Link) for parts. Most of the parts for this product are not available.

 

Regards

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