Guru Meditation problems

[Gavilan]

Hi guys: i have an Amiga 500, which boots normally, but sometimes, i get a Guru Meditation error 00000004.

somebody could tell me please what could be wrong with the machine??

Thanks in advance

Sebastian

[Argo]

Illegal instruction?

What are you running when it gurus?
Is it a plain unexpanded A500?


Remember to enhance you calm...

[Gavilan]

@Argo: nothing. It just happens as soon as i switch the machine one.
it happens randomly. The machine is a plain A500 with nothing extra added.....

 :-?  :-?  :-?  :-?

[Thomas]

Could be everything. Dying power supply, dying RAM chips, corroded contacts on the RAM chips or the CPU, loosely sitting RAM expansion, leaking battery on the RAM expansion etc.

Bye,
Thomas

[Gavilan]

@Thomas: i got no Ram expansion.

The machines boots up perfect always the very first time you switch on the machine.

Then, when you switch on/off several times, i get this guru meditation errors:

- guru meditation #00000004.0000621e
- guru meditation #00000004.00003342
- guru meditation #00000004.00001970

Last one is most common guru i have noticed on the machine

Im trapped here.
 The machine used to work perfect. I´ve seen no corrosion since never used a Ram expansion...

Also all contacts seeem to be making perfect contact....and i tested with 3 different Power Supplies

What could it be??

Any hints? IdeaS? Please help!!!

Sebastian

[Gavilan]

Added new info: changed both rom & proccessor: same synthoms, but i have discovered that the behaviour of the machine is not erratic

Every time i power on for the first time, it works perfect. Issues appear after a reset, and a grey screen is all i get after Guru meditatin errorr described before

Any ideas? Anyone? Please!!!

Sebastian

[weirdami]

maybe try waiting a few seconds before reswitching it on. count to ten and see if that helps.

[Damion]

*edit* oops, I read A600 for some reason. Anyway, re-seating all socketed chips is a good idea.

[rkauer]

 Reseat Agnus!