Usable RAM simms in SE

[larsove]

Are these ram chips compatible with the SE?
I have 4 of each one. (They are all 1mb simms as far as I can tell)

 

[bibilit]

Yes they are, no problem for using them in the SE

 

[larsove]

Yes they are, no problem for using them in the SE

Thanks! Then I'll have some more testing to do. My SE still freezes after being powered on for a while. Ran RAM-tests in loop using Apple Personal Diagnostics. 8 chips have passed that test so far - but it still crashes. (fully recapped, and OK voltages are 5.082, 12,73, -11.47).

 

[bibilit]

12 Volt rail seems a bit high to me even the -12 volt is pretty unusual.

Also your Ram is OK, but i will try with a matching set (in you case you have 3 different sticks) probably ok, but i like having a matching set if possible;

 

[larsove]

12 Volt rail seems a bit high to me even the -12 volt is pretty unusual.

Also your Ram is OK, but i will try with a matching set (in you case you have 3 different sticks) probably ok, but i like having a matching set if possible;

I have matching sets of all the four(16 simms in total).
I too initially thought the 12v voltages were a bit strange. The psu have been recapped as well as the logic and analog board. So maybe some voltage-regulator in the psu are failing, or other components?

 

[Phipli]

There is only a single regulator in the PSU, so most 12v rails are quite far off. They are also higher if you don't have them loaded down with a spinning hard disk, only an SD card.

Weirdly 12.73 is about normal. Only way you'll get it down (without loading it with stuff, or lowering the 5v) is with a non-original powersupply.

 

[larsove]

There is only a single regulator in the PSU, so most 12v rails are quite far off. They are also higher if you don't have them loaded down with a spinning hard disk, only an SD card.

Weirdly 12.73 is about normal. Only way you'll get it down (without loading it with stuff, or lowering the 5v) is with a non-original powersupply.

yes, no harddrive just an external blue scsi. so maybe the power isnt the cause of my crashes/freezes? the same BlueSCSI/SD-card works good on other SE/Plus/Classics that I have. This SE really has me scratching my head...

 

[Phipli]

I'd try removing the RAM and cleaning the contacts. Wiggle the RAM a little as you put it back in to scratch for good contact.

If that doesn't work after a couple of tries, try some RAM from another machine.

 

[larsove]

I'd try removing the RAM and cleaning the contacts. Wiggle the RAM a little as you put it back in to scratch for good contact.

If that doesn't work after a couple of tries, try some RAM from another machine.

I've tried different ram. I also cleaned and brushed the slots with contact cleaner and a brush. and I've cleaned the SIMM-pads with fibreglass pen(carefully) and cleaned with IPA. Same result. Ive also cleaned the ROM chips and sockets. still the same.