Login
Back to forumSee the full topicGo to last reply

Posted By

JamesC
on 2002-08-15
 Defective Plus/4

Paul, this was discussed in the comp.sys.cbm newsgroup, in fact I think you brought it up.

First, swap power supplies. Plus/4 uses two different input voltages and you might have enough to power the case light but not enough to initialize the chips.

Second, swap the TEDs in your two Plus/4s to see if the problem stays with that one Plus/4 or if the problem follows the TED chip no matter which motherboard it's on.

If swapping TEDs doesn't work then swap the CPU (7501 and 8501 are compatiable with each other but nothing else... 7501 is original, 8501 is high-speed manufacturing process).

Verify that your monitor cable's RCA plugs are in the correct sockets on the back of the monitor. Using your 128 or the other Plus/4 can do this.



Back to top


Copyright © Plus/4 World Team, 2001-2024