TWGS Hanging for No reason

[Erik GACHOT <erik.gachot@vbo.mts.dec.com>]

Hello,

	I have a TWGS which was working very well until now.
	
	Now my system is hanging with no reason,
	or crashing. Sometimes when I try to reboot the machine
	I get a strange screen, and I have to move a little bit the
	Cristal and then it boot again, But crashes after under the
	Finder or applications.

	I removed the TWGS and put back the initial CPU and all is 
	working fine, so it's my TWGS (~10 years Old).

	Could it be possible that my Cristal is no more good ?

Thanks for any infos,

		-Erik Gachot.