I haven't seen that myself or seen it reported.
Can you get any
backtrace info?
Bad ram? Overheating?
My own X700 has died, it won't post anymore. Several other users have reported bad capacitors which makes sense since it's a design from the
capacitor plague era. In my experience bad capacitors will stop it booting before it starts crashing. I guess that all depends which cap(s) are bad.
Steve