I have one of these RS-918 mcHF clones. Mine failed after a few weeks to power on.
Watch these videos to see how I found a fix and repaired the SDR radio to original capabilities.
I hope this helps everyone who buys one of these SDR radios. FOr more info on the radio itelf, I bought mine here: https://amzn.to/2HvmWCJ
And yes I am very happy with it.