MV2F repair (click of death)

Rom1

n00b
Joined
Feb 9, 2017
Posts
11
Hi,

I got a MVV-2F MVS stuck on a click of death.

What I already done (or at least what I remember) is:

  • checking for bad traces - both looking at them and using a multimeter
  • removing the battery (had no leak)
  • changed work ram
  • removed backup ram
  • tried unibios and diagbios
  • checked 5v and 12v


Also:
  • VEC stay low all the time (this looks normal)
  • OE# on bios chip stay high all the time :/

As OE is always high i check NEO-EO, G0 and C1. This looks ok as SROMOE L and SROMOE U stay high all the time too (so the AND gate outputs a high too).

I suspect C1 is malfunctioning, or at least something is messing up with it.

Is there anything I can do to narrow the origin of the problem ?

Thanks a lot
 

Xian Xi

JammaNationX,
15 Year Member
Joined
Dec 1, 2005
Posts
27,748
You weren't clear enough but did you check the continuity between Bios, WRAM, BRAM and CPU?
 

Rom1

n00b
Joined
Feb 9, 2017
Posts
11
Yes, i check both adress and data lines.
I also checked OE/WE and everything looks fine.
 
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