daver2
10k Member
Follow Nivag's advice and try the ROMs one at a time in the socket he recommends.
If you get one that results in the "random screen of death", remove that ROM, put it to one side as "dead" and carry on with the others.
We can then determine which ROMs appear to be good and which ones not.
We can repeat a similar test (later on) for the RAM. Get a set of RAMs that work (as now) and replace ONE of the good RAM devices with ONE of the unknown ones and test with PETTESTER. If that test fails - the RAM is duff. If that test passes, swap that same device for another unknown one. Any that fail the test are obviously duffers. We can take the rest forwards and test those further with PETTESTER.
Dave
If you get one that results in the "random screen of death", remove that ROM, put it to one side as "dead" and carry on with the others.
We can then determine which ROMs appear to be good and which ones not.
We can repeat a similar test (later on) for the RAM. Get a set of RAMs that work (as now) and replace ONE of the good RAM devices with ONE of the unknown ones and test with PETTESTER. If that test fails - the RAM is duff. If that test passes, swap that same device for another unknown one. Any that fail the test are obviously duffers. We can take the rest forwards and test those further with PETTESTER.
Dave