> I am struggling to upgrade the RAM in my Plus from 1 to 4 MB. I am not
> good at or familiar with working with hardware, so I tried very hard to
> follow instructions. I took out the old 256K SIMMS, put the 4 "new" 1
> MB ones in, tried to make sure they were snapped in all the way. I
> snipped one end of the R8 resistor and bent it out of the way. I
> reconnected the 2 cables I had disconnected in order to get the
> motherboard out - power and floppy cables, I believe - again being as
> careful as I could to make sure they were reconnected properly. I wore
> a grounding strap throughout the process and handled things as gingerly
> as I could.
>
> Upon booting up, my Plus' screen is now covered with little vertical
> lines of varying lengths, gently wavering. Before I opened up the Plus
> and changed the RAM, it had been fine.
>
> Any guesses as to what I might have done wrong, or whether there's a
> possibility the SIMMS I put in are bad?
A couple of possibilities:
1) bad ram. Try only 1 pair at a time in bank A.
2) incorrect ram. The plus does not like 2- or 3-chip simms. You need 8- or
9-chip modules.
3) dirty contacts. Remove simms, blow air to clear out any debris in the
sockets. Use a pencil eraser to gently clean the contacts on the simms
themelves.
4) select resistors not cut. IIRC, there are 2 resistors to cut ("one row" and
"256k"). Maybe your board doesn't have both, but check anyway. They're both
150-ohm (brown-green-brown) resistors.
Good luck!
--Cheers,
Tom
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