Motherboard replacement. Are other similar motherboards compatible? How to check?

[JaneDo3]

I'm looking to replace a motherboard of a laptop HP dv7 pavillion 1140en. It is part of 1100 series.

The motherboard inside is 503395-001 JBK00 LA-4092P and ram(if thats relevant)  number is 480382-001
So the laptop is old and I can't find an exact copy for it for reasonable price 20-30$. But I can see a close matches, I assume they were used in other 1100 series models.

For example I don't know whether  506124-001 JBK00 LA-4091P is compatible with my laptop.  It's bit different from mine (503395-001 JBK00 LA-4092P). 

[WAWood]

@JaneDo3 

Before you spend any money to attempt to replace the HP motherboard, you need to understand the issues involved with doing that.

First, HP does not sell new motherboards except for rare exceptions. If you use this link to go to the HP site and do NOT see your motherboard listed, that means HP does not sell it: http://support.hp.com/us-en/product/HP-Pavilion-dv6-6c00-Entertainment-Notebook-PC-series/5191856/mo...

That means any motherboard you buy will be USED, having been taken from another PC. Those often do not work, or have internal problems that the seller does not disclose. So you spend a lot of time disassembling your laptop -- a very risky thing to do -- putting in the replacement motherboard, and then reassembling your laptop only to NOT have it work!

Also, the licensed Windows version that came preloaded on your laptop is an HP OEM Version -- and that license is tied to the original motherboard, not to the PC owner. When you toss away that motherboard, you toss away the license -- and HP will not provide you a second license. Since the versions of Windows you can buy will not activate with the embedded HP OEM license, you will have to buy a Retail version of Windows, and a license to go with it. You will then have to replace the installed Windows version on your laptop with the version you bought and license it. We are not able to assist in any of that work.

The bottom line is the process is a lot more difficult than simply swapping one part for another.

[JaneDo3]

Why are you discouraging people from repairing? That's not good for the planet. And I'm still wondering whether other motherboards from 1100 series are compatible, or I have to get one from specific model.