| Click here to select a new forum. |
| Macintosh SE Mouse pointer stuck |
Posted by: Fred1212 on 2022-07-25 23:31:01
Have an SE, early two 800k floppy model, that I have been sorting out and it has been working for about a week. Today developed the checkerboard pattern on the screen so I resoldered the connections on the analog board that connects to the tube back connector. All good worked again for about ten minutes then rewbooted into checkerboard pattern, tried resoldering agin but no go. Had a spare analog board so changed it and it worked for a short time and then rebooted but now the screen is good but the mouse and the serial ports for appletalk no longer work. Tried a couple of mice and booting from another system but the pointer is stuck in top left hand corner and nothing works. Anyone come across this? thanks |
Posted by: Phipli on 2022-07-26 09:21:54
Weird. Sounds like a 6522 VIA chip is playing up, or the interrupts are being blocked. Check the logic board for any bits of wire or metal stuck on it and search for any damage. |
Posted by: dochilli on 2022-07-26 11:22:26
Are the ABs recapped? Could be a problem with the voltages (5 & 12 V). You could check them at the floppy port. |
Posted by: volvo242gt on 2022-07-26 13:30:44
How's the analog board cable that goes to the logic board? My SE did the same. Discovered that it'd work fine if I moved the cable around. Verified it was the cable by flipping it around. The area on the cable that I'd touch to make it work wound up being at the other end (same part of the cable itself) of the run. |
Posted by: rjkucia on 2022-07-26 14:13:45
Does a keyboard work? Or is ADB completely busted in general? |
Posted by: Fred1212 on 2022-07-26 17:43:15
Thanks for the replies everyone. AB is not recapped but voltages at floppy port solid 5v And 12V. The mouse and keyboard both don't work. Going to re solder all the connector pins on AB and LB and give it a really good inspection for cracks in tracks etc. cheers |
Posted by: volvo242gt on 2022-07-26 18:12:08
While you're in there, check to see if there's any sign of damage on the wires of the harness. That's exactly how my SE acted when the cable was bumped the wrong way. It'd freeze up, then I'd try to reboot it, and be greeted by the checkerboard. Move the cable a little, and *BIPPP*, the machine would start up. |
Posted by: Fred1212 on 2022-07-26 19:53:30
Unfortunately all I have now is a working screen and it no longer attempts to boot. The LB is stuffed I think and I don't think I'm clever enough to fix it. Dissapointing as it was working really well and I was just playing around with updating the system etc. |
Posted by: joshc on 2022-07-26 21:07:19
and it no longer attempts to boot What does it do, exactly?
Have you reseated RAM and the ROM chips etc?
It's worth re-flowing the solder for the power connector socket on both the logic board and analog board sides, do the yoke connector as well while you're at it. They are prone to having weak solder joints. |
Posted by: Fred1212 on 2022-07-27 00:46:33
@joschc I've reseated the ROM and RAM and just recapped the LB. Managed to get it boot once but the adb still not working. Going to double do all my solder joints again and see if that helps. Thanks for your input. |
Posted by: Fred1212 on 2022-07-27 22:31:23
Still trying, resoldered all suspicious joints and it booted from HD to Welcome to Macintosh screen then locked up. Restarted and no longer boots. |
Posted by: joshc on 2022-07-28 00:08:31
Restarted and no longer boots. What does it actually do? Stuck on grey screen, sad Mac, or what? |
Posted by: Fred1212 on 2022-07-28 17:57:13
On first restart it made it to the Welcome to Macintosh screen then locked up. Restarted just the screen lights up grey screen and it doesn't attempt to boot. Cheers |
Posted by: joshc on 2022-07-29 15:07:18
Got any different RAM you can try with this machine? |
Posted by: Fred1212 on 2022-08-01 17:56:26
Hi again tried another ram set and got the SE to boot up but the mouse is still syuck in top left hand corner and the keyboard doesn't work. What should I be looking at in the ADB area? Thanks |
Posted by: rjkucia on 2022-08-02 08:09:13
You can check the voltage of the ADB ports to see if you're getting 5V (http://www.interfacebus.com/ADB_Pinout.html)
If you're not getting 5V, check traces on the board. Might just be a broken trace.
If you are getting 5V, and your keyboard has a soft-power button, you can see if that button does anything while the machine is booted. The soft-power button can't boot the machine, of course, but IIRC it either starts a shutdown or prompts for one if you're already booted. I'm not sure if a certain system version or configuration is required to support that, though.
Or you can just ground pin 2; I believe that's just what the soft-power button does (but I'd want someone to back me up on that first)
Edit: Of course, you should check both these things on both ADB ports, so you can further determine where the failure lies. |
Posted by: Fred1212 on 2022-08-02 18:31:54
Thanks I'll try that |
Posted by: volvo242gt on 2022-08-03 10:19:19
7.5.1 was the first system version when the power key was utilized for bringing up the shutdown dialog box. |
Posted by: rjkucia on 2022-08-03 10:24:28
7.5.1 was the first system version when the power key was utilized for bringing up the shutdown dialog box. Aha, didn't realize that was so late, but fortunately that should run on an SE (slowly) if you have a drive with that installed. |
Posted by: volvo242gt on 2022-08-03 10:39:03
Aha, didn't realize that was so late, but fortunately that should run on an SE (slowly) if you have a drive with that installed.
Yeah, it's a bit pokey on mine. Much prefer using 6.0.8 instead. |
| 1 > |