Meike MK-RC7 update: one receiver dead

Just an update about my Meike MK-RC7 flash triggers. One of my
receivers died for no apparent reason. By dead, I mean that it won't
turn on at all even if I replace the battery. I didn't drop it or get
it wet. Notably it is the receiver that I use more often. The other
receiver that I use less often is still functioning (for now).