Search results

Has it been recapped? Duo 280s WILL DIE if C72 has leaked/degraded. U2 (I think) shorts out and the 5V rail is shunted to the 24V of the DC input, killing everything inside.

Mouse pointer = machine has already chimed (or thinks it did) Does the pointer move at all, or does the machine appear to hang? Where did you check for the missing -12V? (if floppy port: SE/30s aren't meant to have -12 there). Put down the parts cannon - understand the failure first.

It could be faulty/dirty RAM. It could be the overclock. It could be a genuine hardware failure. Knock the machine down to 400MHz and see what happens. Run it on a single RAM stick, if you have more than one. If still troublesome, see, if possible, if it works off the onboard ATA controller.

Yeah, that would suggest something wrong with the system bus<>controller side of things, not controller<>peripheral, but who knows. I'm assuming the mouse acts weird even not booting off the 20SC? That would eliminate software.

A tentative answer is "there's still cap crud from somewhere sitting on the ADB dataline".

Attempting to re-solder those to the CPU speed-doubler will probably have a poor outcome. The missing corner pin is probably absent for keying reasons, one of them is TDO (test data out, part of the JTAG port and unused in the Mac), and the other is !IPEND, also unused. So don't bother "fixing"...

ANS are architecturally almost the same as a 9500/9600, and the ROM modules are electrically the same as in any PPC Mac. That doesn't help any, however, because the AIX-only ROM in the ANS is specific to those machines. It might be feasible to modify a regular Mac module with chips other than...

I've got this really odd clone PCB from Brazil - calls itself the Spectrum Micro Engenho II. Has a Disk II onboard, and the machine was (as can be seen on this pic I got off the internet) an IBM-lookalike with a detachable keyboard. Unfortunately all I have is the board.

68030s are C(eramic)QFP - grinding into that alumina isn't really viable.

Nice find and save on the sound jack.

They're probably gonna be 500mA or 1A. One is for termination power on SCSI, the other is for transceiver power on AAUI.

I'm guessing they'll be in small buffer mode (R17{5:7] populated) - LC040s do not implement large buffers. I recall looking at that when gawking at my own Q800 board, but my brain threw out the notes on it.

FWIW, 165c is a different panel - different resolution, even.

No. Not everyone is sufficiently skilled to go poke at TSSOP flash. This method is non-invasive, and requires no additional hardware besides a 2nd computer and ethernet cable.

:wondering if the 240MHz MCU on my SCSI disk emulator is period-correct:

No, that is the toolbox file that gets loaded into RAM from the boot media. What's needed is a dump of the machine's raw firmware (i.e. what loads those).

I don't mind iBooks either - poor HDD placement is a thing in all of them, Clamshell thru G4, but other than that, they're nice to work on. Slotloaders, though? Pass.

All of mine (400, 550, 867, 1000) have bad paint. The 400 and 550 have bad hinges and bad polarizer too, are in pieces and might end up scrapped. The 1000 has bad L3. That said, they all boot fine.

Besides what @Phipli said, is there any documentation on previous success with that configuration? I would be concerned that the 040 board+601 are just too big a strain on the CC PSU, and as things go, it simply sags to the point the machine is unstable. Measuring 5V when the machine hangs would...

Are they? The only logic-related fault I'm aware of on Titaniums is, on 867/1000s, the L3 failing - and that happens to AlBooks as well, so... Construction is crappy, but so is the Pismo's.