Question about HP Compaq Motherboard

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Power socket needs replacing on motherboard

Power adaptor heats up, melts pin. power socket needs replacing on the motherboard. Local technicians ask exorbitant prices for labour and parts( equivalent to buying another PC). Any solutions, prices?

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  • niresh148 Apr 22, 2009

    110 volt socket from outside. its a laptop


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Are you refering to the multisocket on the motherboard coming from the power supply or the 110 volt socket into the back of the power supply from the outside? PC or laptop?

Posted on Apr 22, 2009

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Casio keyboard will not power on

2 possible solutions to look at.

1) Ensure that the power adaptor is the correct polarity. Ideally you should use a Casio power supply rather than a generic one. For Casio the centre pin must be - Negative. Many power supplies have + as the centre pin, this is therefore like connecting the batteries up backward - IT MAY DAMAGE YOU KEYBOARD

2) The socket on the keyboard where the adaptor plugs in is prone to breaking and coming loose from the circuit board Looks something like picture below ( maybe grey ) This can often be diagnosed by holding the power adaptor plug where you clip it into the keyboard and moving it at the same time as turning on. If you get any lights the socket is faulty and will heed to be replaced. If you post the model number I can advise on socket needed.

3) More serious internal damage possibly as a use of wrong power supply ( see note 1 )

Good luck in tracking the fault.


Mar 11, 2014 | Televison & Video

1 Answer

How to physically replace the power supply connector that is soldered to the motherboardon the right side of the memory modules

itis possible but you need to solder it on again without making a conection with other component so rather take it to the pro

May 11, 2013 | Gigabyte GA-890GPA-UD3H Socket AM3/ AMD...

1 Answer

My hp laptop powers on with a dark screen and then restarts

Check that your AC adaptor is functioning correctly by substituting it with a known good one. (Flickering of the LED light on the charger indicates that there is a fault with the laptop where power is being "spat back").
Check the output voltage using a multimeter and see if the voltage remains steady at the jack of the charger terminals (inner pin and outer plug)
If the charger is functioning ok, check the tightness of the plug in the DC socket, any looseness, or sparking indicates a DC socket that needs replacing.
If this is ok, the problem will most likely lie in the power capacitors on the motherboard and these will need checked by a qualified technician.

Jun 21, 2012 | HP Pavilion Computers & Internet

1 Answer

Hp dv4 power supply diagram

Power Supply is the AC adapter (Charger), the DC Power Jack harness it plugs into in the laptop, and a power sensor chipset, or chipsets, on the motherboard.

[ Chip and Chipset are slang terms for I.C.
Integrated Circuit, ]

As for a diagram of how the Power circuit runs on the motherboard, it isn't available to the general public. It is part of HP's, and/or the motherboard manufacturer's, design patent.

All I can state, is that you may want to check out the continuity, of the DC Power Jack harness. (Ohms check of each individual wire)
See if it is good. Also make sure it it plugged in tightly to the motherboard.

Past this point it's check out the motherboard with a dual trace oscilloscope. Trace the power circuit down to see where the problem is.

Bad power sensor chipset? Usual repair is to just replace the motherboard. Cost, and obtain ability of procuring the chipset, plus technique, and tools involved, justifies replacing the motherboard, and not trying to replace just the chipset.

The chipset is mounted to the motherboard via a BGA Surface mount.

BGA Surface mount:
Compare to an older Intel Pentium 4 processor, that uses a Socket 478 processor socket.
The bottom of the Processor chipset has contact pins. 478 of them.
The processor socket has matching socket holes. 478 of them.

With a BGA Surface mount, there are no contact pins, nor matching socket holes.
Solder Balls take the place of the contact pins on the chipset.
Copper Pads take the place of the socket holes on the motherboard.

The chipset is set into place over the motherboard, with the Solder Balls lining up on the Copper Pads.
The chipset is set down into place, and heat is applied.

Heat is applied at a specific temperature, and for a specific amount of time. The solder balls melt, which solders the chipset to the copper pads. (Which in turn solders the chipset to the motherboard)

To replace, a BGA Rework Machine should be used. Not something everyone has laying around. Read - Expensive.
Therefore repair is expensive.

Justifies motherboard replacement.

HP Pavilion and blue - dv4

For additional questions please post in a Comment.
I would like to know what specific problem you are having, also.


Jan 04, 2012 | HP Computers & Internet

1 Answer

My taillight (rear - passenger side) is not working - the other one on the driver side is. I change both bulbs in the non-working on (bulb #1157) and the tail light is still not working. What do I do...

Check the bulb socket. They get really hot and heat can cause the wires to melt solder holding them in place. If you have a test light, probe the socket pins for power,(light switch on). If none on either pin, then probe the wires an inch or so back from the socket. If wire(s) have power replace socket. If not, and even if you find power on the pins but the lamp doesn't work, then also check for a bad or loose ground wire.

Aug 21, 2011 | Subaru Legacy Cars & Trucks

2 Answers

DELL E1705 model. When connecting AC adapter, even before pressing power button, led in power adapter goes off immediately. Why ? The power adapter is OK. When connected with Battery, no switch-on.

Since the system is not working ion both battery and the adaptor it could be a faulty motherboard.. Call dell @18006249896 if you are in warranty.. Contact local tech if thr\e system is out of warranty....

Sep 14, 2010 | Dell Inspiron E1705 Notebook

2 Answers

The little green light on charger goes off when i plug it into Dell Inspiron 6400, the charger works fine

Unplug the battery from the laptop and then plug the AC adaptor into the laptop. If the green light still goes off then your motherboard is shorting out the adaptor and the motherboard needs to be replaced.

May 17, 2009 | Dell Inspiron 6400 Notebook

2 Answers

I have a Toshiba Satellite M45-S359, Power Supply Problem.

It could be the motherboard as it is what is powered initially and distributes power to all other parts.
such a problem can only be diagnosed by checking physically but if you are asking whether a motherboard can be the cause, then yes it can

Mar 02, 2009 | Toshiba Satellite M45-S359 PC Notebook

1 Answer

Power supply aux power connection burned out

If this happened on three supplies, the trouble has to be in the motherboard connector. Probably one of the pins is corroded or very loose and causing a poor connection. The resulting heat is melting those connectors. You would be best off replacing the board since you don't know if other problems may be waiting to occur. A replacement would probably cost around $50 to $60.

Feb 20, 2009 | Asrock 775i65G Motherboard

4 Answers

Power Supply Question

hi you can buy a new 20 pin to 24 pin adaptor from ebay for a few pounds, or most new power supplys do have a 24 pin slot for your motherboard power let me know if you need anymore help regards steve,

Mar 18, 2007 | ASUS A8N32-SLI Deluxe Motherboard

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