Yeh, it can be repaired---in the same sense that a flooded out car can be repaired by throwing a ton of money at it.
HP has a known issue with Nvidia chips and the motherboard is almost certainly blown. It will cost about $300.00 to fix and chances are about 70% that the next motherboard will also blow.
Get a Lenovo or some other brand, and do not buy this fellow's junk. Remember what the Romans said; a fool and his money soon are parted.
The above comments do not apply if you are a hardware techie who just wants to cannibalize this computer for some parts. It does have some salvage value, like a totaled out car has. But if you are planning on turning it again into a working computer, it is past saving.