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My Dell 7720 had the well-documented battery charge issue... it wouldn't charge or even use the battery. I tried replacing the power jack, the charger brick and the battery to no avail. The final option was to replace the motherboard. As it's an expensive and time intensive option to implement, I was hesitant. The last thing I wanted was to buy a used or reconditioned motherboard with the same issue. Upon searching ebay for the motherboard, I found many options. Most shipped from Asia and thus had long lead times. Some offered guarantees, but the thought of having to return it overseas if there was an issue was less than appealing. When I saw that the board from caosuning's store shipped from the NYC and for free, and carried a 30 day guarantee, I was sold. The board arrived well packaged and on time. After a bit of work, I got it installed and viola: a perfectly working laptop! Thanks to caosuning for the accurate listing, quick delivery and decent product. FYI: One of my biggest concerns regarding replacing the MB, was that it would violate or invalidate my Windows 10 upgrade license. Since I'd gotten the upgrade free as part of the Windows 10 rollout, I didn't have a new license code. I was nervous, as many folks had said changing their MB had required them to contact MS and jump through a lot of hoops. Upon powering-on my device after the MB replacement... nothing needed to be done! So it seems as long as you keep the same processor, hard drive, etc, it doesn't seem to invalidate your license. One last note: make sure you backup or at least write down your current BIOS settings before you replace your MB, if possible. I made a noob mistake in not configuring my boot options before booting the first time after replacing the MB. I thought I'd lost my boot sector and was thinking I'd have to resort to rescue disk options or the like. Upon setting the correct config, everything worked as it did before.Read full review
Verified purchase: Yes | Condition: New
