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- Path: erc.cat.syr.edu!bpease
- From: Lorax <bpease@erc.cat.syr.edu>
- Newsgroups: comp.sys.cbm
- Subject: can you identify these symptoms?
- Date: Fri, 9 Feb 1996 22:03:25 -0500
- Organization: Syracuse University, Syracuse NY, USA
- Message-ID: <Pine.D-G.3.91.960209215744.7131E-100000@erc.cat.syr.edu>
- NNTP-Posting-Host: erc.cat.syr.edu
- Mime-Version: 1.0
- Content-Type: TEXT/PLAIN; charset=US-ASCII
-
-
- I've got four broken computers that I desperately need to
- fix...especially one or both of the 128's. Here are the symptoms and
- circumstances of each...see if you can point me in the right direction:
-
- 128D - broke it will plugging in a lightpen I was building. The computer
- was on, and I must have brushed by the wrong pins and shorted it out.
- The internal disk drive comes on and so does the power light, but there
- is no display and disk commands typed in have no effect (this is the case
- with the following as well). The only fuses are in the built in power
- supply, and they are fine.
-
- 128 - Swapped the 16k VDC for 64k. Screen flashes garbage then
- disappears. Checked all connections on VDC...they're fine. Found a
- blotch of solder on the underside that I must have spilled, near the
- Z80. Removed it...still doesn't work.
-
- 64/64c - Both were plugged into a power supply wrong...this is a heavy
- duty power supply which is really just a modified 128 one. The plug goes
- in three different ways even though only one is correct. The fuses are
- fine and the light comes on. No display nor reaction from the computer.
-
- Any suggestions?
-
-