HP Pavilion dv9000 fried ribbon cable

[naulgo]

The laptop wasn't powering on anymore though was getting power from the AC Power Adapter. I opened the laptop and noticed the that the power ribbon cable was fried partially by the motherboard connection. Replaced it and test it for few days. It worked fine customer picked it but came back with the same problem again, a fried power ribbon cable. So i've replaced it again and it's working fine for the last 3 days. Powered on and off bunch of times , used different wall plugs , test it with battery and without, different power adapter,had the laptop turned on 10hrs straight... it worked and works just fine .What it's causing the ribbon cable to get fried/melted ? And why is working fine on the shop but not when is with the customer ?

P.S. im new in fixing laptop/computers ..any advice's or solution are much appreciated !
Thanks..

 

[JustInspired]

Wires that get hot enough to melt are carrying too much current.
One of the most common causes for over-current is a bad (loose) connection.
Please check all connections including the power socket to make sure there is nothing that will cause resistance in the path of the power.
Dirty, burnt or corroded contacts in the power socket can cause this and so can a partial break in the DC cable between the charger and the plug that goes into the laptop.
Make sure nothing is causing a partial short against the metal parts of the chassis, hinges and other metal bits.

Also worth checking the prongs on the AC plug for signs of arcing and burning. If in doubt swap the charger.

 

[Slaters Kustum Machines]

When does the issue occur for the user? During power on or after being on for awhile? Are they plugging into the same outlet in the house? Are you charging with their charger or your own?

 

[naulgo]

When does the issue occur for the user? During power on or after being on for awhile? Are they plugging into the same outlet in the house? Are you charging with their charger or your own?

Charging with their and our universal power adapter. Customer said he checked the power outlets and they are fine. Laptop didn't power up at all.

 

[naulgo]

Wires that get hot enough to melt are carrying too much current.
One of the most common causes for over-current is a bad (loose) connection.
Please check all connections including the power socket to make sure there is nothing that will cause resistance in the path of the power.
Dirty, burnt or corroded contacts in the power socket can cause this and so can a partial break in the DC cable between the charger and the plug that goes into the laptop.
Make sure nothing is causing a partial short against the metal parts of the chassis, hinges and other metal bits.

Also worth checking the prongs on the AC plug for signs of arcing and burning. If in doubt swap the charger.

The AC plug looks fine , didn't noticed any sign of metal bits that might cause a short. Noticed a burn sign on the motherboard connector where the ribbon was connecting. I have cleaned it in and out that connector with compressed air , brushed it and with a cotton swab with rubbing alcohol. As we speak the laptop powers up and runs just fine at the moment.

 

[kisk]

Noticed a burn sign on the motherboard connector where the ribbon was connecting.

I'd check some of the transistors around the connection point. I'm in the process (waiting for shipment) of replacing a mobo for a client because of a transistor failure (ultimately likely due to liquid damage somewhere on the board). The failure caused a spike in voltage to the ribbon and melted the connector where the voltage flows to the LCD's LED. Dell Inspiron N5010.

You may be looking at a mobo replacement to fix this, just a heads up.

Edit: Here was our issue [pic]

 

[easytechnician]

If you don't mind my asking, what is the standard running temperature of the laptop?