need help fixing my pc

Do you guys think it is still worth fixing it? the parts were good when i bough them this pc hardly lasted an year but had good parts and i spent 1000$ at that time on it.
The cpu i think is still good and 7870 could maybe run games at high what do u guys think?

when you say you "rma'ed all you could" what does that entail? are some of those listed parts from the dead build from two years ago, or is that list the rma replacements?

tbh if you don't know for certain the cpu still works, i wouldn't poor any more money into a replacement motherboard. really the three items you requested suggestions on besides the motherboard are pretty open for $540 for only those items, i'd probably try and squeeze in a graphics card upgrade over worrying about a replacement motherboard if the old one still works.

The CPU might bottleneck you some with a good graphics card, but frankly I don't know how far you're going to get with the 7870 in the first place. It was a good card in 2012, but it's not 2012 anymore.

I wouldn't recommend scrapping the build entirely; you've still got the basis for a mid-range machine. Unless the 8350 runs really hot (or you plan on overclocking) the Cooler Master Hyper 212 EVO would be my recommendation for a decent cooler. If the motherboard does what you need I wouldn't bother with the hassle of replacing it. I can't speak for power supplies, as I don't know what's available locally for you, and most enthusiasts would crucify me for what's in my build anyways.

Don't know anything about prices in India, but for parts suggestions:

PSU: Seasonic or EVGA would be good brand choices.
CPU cooler: Noctua NH-U12S
Case: This really depends on your aesthetic preferences, and durability concerns (will it be getting moved around a lot?)

I would upgrade the GPU too. Even a 1050Ti would perform better then what you currently have.