Well I just did to an my old FX5200 thats acting up lately and finally died (I thought) on me. I was thinking I got nothing to lose so what the heck try to wash it with dish washing liquid. I submerged it for more than an hour and blow dry it before putting it back...lo and behold...it came back to life!
Been 2 weeks or so since then and its still working
Been 2 weeks or so since then and its still working