Re: Lenovo G580 7981P accidently shorted Q83
Seems I'm missing the 3V line.
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Re: Lenovo G580 7981P accidently shorted Q83
Hi,
I have no hdd with a OS on it but I've cross checked with a working QIWG6 LA-7988P board, where I have 3.3V on Pin 3 and 2 of Q83.
On the LA-7981P I have 3.3V on Pin 3 but 0V on Pin 2.
I've bought the working LA-7988P Notebook to upgrade it, so the LCD, cable etc. are all functioning.
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Lenovo G580 7981P accidently shorted Q83
Hi,
I've bought 3 Lenovo G580s from a friend, all with different defects.
On this particular board, the 7981P with discret graphics, he shorted Q83 near the LVDS-Connector by dropping the LVDS-Plug on to Q83 while under power.
I then replaced Q83 from another board but still no luck.
What else do I should check? The board starts but no display. Using Vga, my monitor says out of range but is capable of 1920x1080.
I've attached the schematic plus top and bottom of the board. I've circled the replaced component....
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Re: HP G62-b10sg does not charge, works with battery
okay I've checked the datasheet and removed the Maxim.
here are my readings:
DCin Pin22=19,4V
ACin Pin02=2,66V
ACok Pin13=0V couldn't figured out what its guess its an output?
Are the readings okay or is there another fault.
Regards,
Michael
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Re: HP G62-b10sg does not charge, works with battery
Hi,
I don't have an ISL6251 but an Maxim8731ae witch is an battery charger and indeed its blown.
Seems my friend hasn't looke close enough.
My part number of the motherboard is 615381-001
Do you have a schematic of this board?
What else do I check?
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Re: HP G62-b10sg does not charge, works with battery
It has been opened by a friend of mine before he gave it to me, who looked for burnt ICs and blown caps but couldn't find anything.
I am searching now for a defective board with no charging issues to swap the power/charging circuit.
Most of the HPs use the same battery. Are there differents between main parts of the charging circuit, like different MAX Ics?
I want to ask because Id like to get a cheap board, lets say from an Dv3.
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HP G62-b10sg does not charge, works with battery
Hi,
I am new to this forum and have a problem with an HP G62-b10sg.
It won't start without a charged battery. When I attach the PSU without an battery installed, the LED of the power switch, short lits up blue and thats it.
If I start it with a charged battery and its powered on, I can remove the battery and let it run from the PSU.
The LED left of the power jack does not lit up and the battery will not charge.
I've tested so far 2 different PSUs, one 18.5 and one new 19V. They are both second brand PSUs. An original HP...
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Re: New Members - please post your introductions here
Hi,
I am Technolix and found this board, while searching on a fault of a latop and found very useful information so far.
Hope I can help others with my knowledge too.
I have experience in soldering and notebook repairs of 10 years.
Glad that I found this forum.
Technolix
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