There was some interest in this so I thought I'd do a quick post on an eBay purchase and restore I recently completed.
After following a couple eBay auctions that ended (or started) at very high levels I decided to piece together a Quadra 700 from parts. I started with the following two BIN auctions:
https://www.ebay.com/itm/204222101906 (battery bombed Quadra 700 in a IIci case; has death chime but included motherboard, floppy and power supply)
https://www.ebay.com/itm/225370133364 (empty Quadra 700 case to put everything in)
I didn't take many "in progress" shots as I'm bad at documenting things as I go, but I started with the basics and replaced the corroded SIMM sockets with NOS sockets, replaced the power LED, cleaned up the crusty solder on the clock related components and wired a new battery socket with jumper wires to D6 and the power LED ground.
The root cause of the "death chime" fault was bad on-board RAM. Perhaps the battery juice shorted something via the SIMM sockets as the corrosion hadn't reached that part of the board. It could be it had nothing to do with the battery at all and the RAM just failed; hard to say with an eBay auction where you don't have the whole story.
Once the RAM was removed and replaced with NOS KM44C1000-6, the machine was fully functional. The floppy had also received some corrosion from the battery bomb and needed rust removal and DeOxIT on the microswitches so it would recognize an inserted disk. Once that was done it was fine as well; someone before me had changed the eject gear and lubricated everything.
After following a couple eBay auctions that ended (or started) at very high levels I decided to piece together a Quadra 700 from parts. I started with the following two BIN auctions:
https://www.ebay.com/itm/204222101906 (battery bombed Quadra 700 in a IIci case; has death chime but included motherboard, floppy and power supply)
https://www.ebay.com/itm/225370133364 (empty Quadra 700 case to put everything in)
I didn't take many "in progress" shots as I'm bad at documenting things as I go, but I started with the basics and replaced the corroded SIMM sockets with NOS sockets, replaced the power LED, cleaned up the crusty solder on the clock related components and wired a new battery socket with jumper wires to D6 and the power LED ground.
The root cause of the "death chime" fault was bad on-board RAM. Perhaps the battery juice shorted something via the SIMM sockets as the corrosion hadn't reached that part of the board. It could be it had nothing to do with the battery at all and the RAM just failed; hard to say with an eBay auction where you don't have the whole story.
Once the RAM was removed and replaced with NOS KM44C1000-6, the machine was fully functional. The floppy had also received some corrosion from the battery bomb and needed rust removal and DeOxIT on the microswitches so it would recognize an inserted disk. Once that was done it was fine as well; someone before me had changed the eject gear and lubricated everything.
