
captainserial
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Here is some pictures of the logic board after recapping and cleaning: https://imgur.com/a/9C4ULXe
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I wish that was it. I tried disconnecting the hard drive and got the same result. Then I tried disconnecting the floppy, then I tried disconnecting both, with no difference. Since I have two of these computers I still have a known-good logic board I can test with, and it boots fine with this hard drive. I thought maybe since the caps were replaced it became more sensitive to the voltages being in range, but I checked them from the floppy port and measured the 12V at 11.88 and the 5V at 4.994, which seems fine. Here is a video of what it does:
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I'm starting to think I killed the processor when I booted it with that RAM chip in backwards.
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Well copying the known-good ROM onto a fresh AT27C010 fixed that issue, but now I have a problem where the recapped board boot loops once and then sad-macs with code 0000000F 00000001, no matter what ROM I use in it.
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I’m in Reno Nevada. I have two with the same 4-chip board, so I’m going to try copying the known good ROM I have first, before I look for a donor board. Thanks for the help though.
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This did help. Since I have a working #4 chip already, I am going to just copy that one onto a new chip, as Bolle suggested. I ordered a programmer and some blank 27C010 eproms. They are apparently still readily available in DIP32.
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captainserial started following Killed a ROM in a Classic II
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I have two Classic II's that I have been working on restoring. This is my first re-cap adventure. I recapped one of the logic boards with tantalums, then cleaned it with an ultrasonic bath and PCB cleaner. When I put the ROM chips back, I accidentally plugged one of them (U25) in backwards, but didn't notice. When I booted it I got scrambled looking vertical bars. When I noticed the backwards ROM, I re-seated it correctly, but it still booted to the same scrambled bars. I borrowed the ROM chip from the other board, and it chimes. So I'm fairly sure I killed that ROM chip. Both boar
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PowerExpress/PowerMac 9700 Prototype
captainserial replied to captainserial's topic in G3/G4/G5 Power Mac, iMac & eMac
Wow, looks familiar too! Is this Hap's? Here's the (mobile) link: http://m.ebay.com/itm/Unreleased-Prototype-Apple-Power-Express-Macintosh-PEX-9700-/152507510472?hash=item238227eec8%3Ag%3A0UgAAOSw%7ECFY7Z%7EO&_trkparms=pageci%253A9fd535d2-22b3-11e7-9f0a-74dbd1a0aab8%257Cparentrq%253A773bb4fa15b0a5eb36167e7dfff7c8ae%257Ciid%253A7 -
PowerExpress/PowerMac 9700 Prototype
captainserial replied to captainserial's topic in G3/G4/G5 Power Mac, iMac & eMac
For those that need it, here is the ROM I dumped: TriPEx.ROM.zip -
PowerExpress/PowerMac 9700 Prototype
captainserial replied to captainserial's topic in G3/G4/G5 Power Mac, iMac & eMac
Mac OS 8.6 System Profiler: Picture 2.pdf Picture 4.pdf It's a Powerbook! lol. -
PowerExpress/PowerMac 9700 Prototype
captainserial replied to captainserial's topic in G3/G4/G5 Power Mac, iMac & eMac
I was able to boot to an 8.6 install CD and connect to my Linux server over AppleTalk so that I could format the SCSI2SD with Lido. It would have been a lot easier with a USB floppy drive! I threw 8.6 onto the SCSI2SD since I knew that version worked. I recovered 90% (I didn't copy some programs and damaged files) of the contents of the original hard drive, but there was nothing that looked like Apple internal or pre-release software on there. It almost looks like a hard drive transplanted from another Mac. I don't want want to expose somebody's personal information, so I won't post the wh -
PowerExpress/PowerMac 9700 Prototype
captainserial replied to captainserial's topic in G3/G4/G5 Power Mac, iMac & eMac
I don't know, I've never even seen a screen like that before. I don't believe this is a new-world Mac. -
PowerExpress/PowerMac 9700 Prototype
captainserial replied to captainserial's topic in G3/G4/G5 Power Mac, iMac & eMac
And there it stands for now. I don't want to stress the hard drive, so I'm switching to booting from the SCSI2SD to try to copy some files. -
PowerExpress/PowerMac 9700 Prototype
captainserial replied to captainserial's topic in G3/G4/G5 Power Mac, iMac & eMac
Hard drive sounds bad. Knocks for awhile, then works normally, then starts knocking again. More picture momentarily. Startup chime is like Shwa-na-na-na-na... -
PowerExpress/PowerMac 9700 Prototype
captainserial replied to captainserial's topic in G3/G4/G5 Power Mac, iMac & eMac
The USPS Gods have brought the mouse a day early, as a sign that they favor this endeavor! I now have everything I need to boot this beast. Here we go...