Upgrading system board

Hi,
I had a DM4-1140sa with a 633863-001 mainboard in it. I bricked the BIOS (through a bad update) and needed to buy a new mainboard. After looking though theuser guide for my laptop I reckoned that I could use a different model's mainboard, if I changed the components dependant on it.
I bought a 621044-001 from the 1060us version of the DM4 from ebay and changed the heatsync to one that had a graphics pad. It all works great but won't recognise the power-plug so uses the battery all the time and only uses the plug when it has zero battery left, and still won't charge.
Is this the fault of the seller; the board isn't new? Or is there another difference between the motherboards that I've missed?
Thanks for any replies

pepe999 wrote:
Simba26 wrote:
Thanks very much erico. All that sentance meant was that the motherboard was of model number 621044-001. The second half was saying that I had bought a new fan/cooling system becasuse the one I had didn't cool the graphics, just the CPU.
The graphics chip came with the board as it's soldered on.
I did reinstall windows and have tried deleting drivers/reinstalling them/disabling devices. The only thing that makes any difference is disabling the AC adaptor which changed the message to "plugged in but not charging."
No, the LED doen't come on like it should, so presumably it's a hardware fault, not a software one? If so then I'll send the board back.
Hi,
I believe that you need a different power charger. I understand that the lappy had a shared Intel HD 4000 graphics which is a part of the CPU so you needed only one fan. Now there is a discrete graphics card and also the same HD 4000 chip on the same board and this means more power. Laptops with shared graphics (your series) need 65W but with a discrete graphics like nVidia 95W!! The part number for the 95W power adapter is: 609940-001
More information: http://h10032.www1.hp.com/ctg/Manual/c03298365.pdf
Hi Pepe.
You may be correct. The link you provided is for the CQ45 notebook series and a different set of graphics adapters goes to the wrong manual. I will have to check the DM4 manual to see what it says.The correct manual does not specify. This laptop does not, as far as I know, have the Intel HD4000 graphics solution. It appears to be more like my last loaner (it was a dv7 model) that had only an AMD HD graphics onboard and no Intel HD graphics solution.
What Pepe suggested is a maybe. If you have access to a 90W power adapter, give it a try to see if it makes a difference.
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ACDBill wrote:
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Replies aren't online 24/7 because of Time Zone differences.
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