dead notes

Sustain problem with j-custom. Some notes are dead. What is your advice? My new RG8550MZ has no sustain at all at the 2nd string 13th fret and 3rd string 17th fret (C 523Hz). The note is abruptly dead in less than 2 seconds. I have discarded vibrations at the bridge, problems with the frets...

Hey, im having a problem with my washburn n-2. Its been like this for a while but basicly what happens is when i play the 21-23 frets on the high E instead of sustaining like it should with a fernandes sustainer fitted, the notes die out incredibly quickly and it almost sounds like its hitting a...