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I have used this XT successfully to low level and format with DOS 6.2.2. a Seagate 225 with a WD 1002 card. Great results. I have another WD 1002 card and another Seagate 225 and am facing these erors. At startup the 1709 error, controller card, but the other one did that too. Debug g=c800:5...

I have an Apple ][ p.s. that will beep my test board but sends a buzzing sound thru the speaker afterward. The board does not fully boot (it is a known good board). What to check in the ps?

Working on one of the early Apple ][e's with the white letters. What is stumping me is several keys are not functioning. I have replaced all the chips in the extended ][e set with the originals, which includes the keyboard ROM, replaced all mb ram with new chips, cleaned all keyboard connectors...

Working on a IIc monochrome monitor. I've got power after replacing fuse. The CRT neck has a dim glow but no video. At turn off it lights with the usual horizontal bands that quickly fade to black. I have looked but have not found web information on the repair of these displays. Any help will be...

I have a III that was working quite well, but alas as all living things go, the crt died. No video but all seems well otherwise. Since I am not well versed with anything but the power supply repairs on these, I'm not sure what the usual places to check are. Is there a first place to look? I wish...

I'm not sure why it is so difficult to find replacement flat ribbon cables to replace those in the Model III and Model IV. The cables I am speaking of the ones for the floppy controller to the motherboard and the RS232 board to the motherboard. I've sent Mouser photos and they were no help. I...

I know the red round pot control works and helps brighten and stable the video. But the video is overall dim and is NOT the monitors and I have tried several. I've also used an Apple ][c Plus and the monitors are nice and bright. What is it on the motherboard that handles this?

I have a bad cable with a bad metal contact I can't repair. This is causing trouble with my known good floppy drives. Are there any cables out there that will work for a Model 4 Gate Array?

This particular computer is in great shape with a nice case, working well keyboard and a great solid green display. After replacing the RIFAs I first tested the unit and it went very well. Then the drives, both of them started acting up. I removed the drives and cleaned and lubricated them. Same...

Gentlemen Forgive me I'm better with the old Apple ][ computers but wanting to get my Model 4's and III working. I have a working M4P that I test disks on so I know the floppies are good. The gate array model 4 I have was working well with both drives being good boys until I attempted to make a...

Hello and happy 3 day weekend! Working on that model 4, took everything apart, cleaned, checked and re-capped the 0.01 250v RIFA film cap. And yes, I got the two cables back in correctly and without breaking, I think. Anyway the issue was and still is this: At power on and after a...

In the model 4, possibly the model 3, there are two flat cables having one end attached to the motherboard and the other end to each of the smaller circuit boards attached underneath the motherboard. Once these are removed from the motherboard they are a bear to get back in without damaging...

Hello All I have three Apple ii+ motherboards that beep but display no video. With this in mind they all three should be suffering the same issue. What to check first? Thank you.

Here is another sticky wicket in my repairing some of the Apple ii+ computer I have. I have two keyboards with bad keyboard encoder chips. Briel computers seems to be out of everything Apple II related. The 40 pin chip is an SMC KR3600-070. Of course Apple places their part number of 331-0931-B...

Hello all What is that power supply plug connector called on the Apple II+/e power supply? Where can you get those critters? Any help greatly appreciated!

Greetings all Going through some of my Apple ][e computers I've had in storage and found the cases have yellowed. Seems the later models with the lighter cases without the white lettering keycaps are the culprits. I noticed the earlier ][e's were painted and molded of a heavier material and...

There is a .1uF 250V film capacitor that has burnt or blown out in several of my Apple ii computer power supplies. It is easy to get to in the Astec and the Dyna, except the Dyna has two of them. They are a simple replace. I am having trouble finding a supplier that has the correct one here in...

I am looking to get a copy of the boot disk (at least) for the QX-10. Any help greatly appreciated.