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@croissantking - I may have a spare IIg board. I know I have three IINT boards, but I seem to remember having a IIg spare (that I recapped). I can have a look to see if I still have it if you want?

My first guess would be that the pick-up rollers are worn and no longer have enough grip to fully pick up the paper and feed it to where it should be. I've had this problem on the original LaserWriter, the II and the 16/600. To test this, try using the manual feed - if that works fine, then it's...

I saw that, but it's the actual upgrade kit - I'm trying to find the original non-plus ROMs. There was an upgrade kit on ebay in 2019 which had the original ROMs (presumably the owner had upgraded their LaserWriter, and then put the old ROMs in the box for safe-keeping) but they wouldn't ship it...

What's the symptoms of them when you try and power them up in a LaserWriter II? If it's where the status lights show either green and paper out, or green , paper jam, paper out, then this is likely a capacitor on the IIg board issue. Like the Mac Classic, these have electrolytic capacitors that...

Wow, thanks for the comprehensive list of caps - I may try and repair some of mine (although then I'd feel even worse about throwing it out after...). Likely to be the toner cartridge, and the infamous wiper blade it contains. The HP 92275A (or 75A as it's also known) didn't go out of...

Either they can have PSU issues, or I've just been incredibly unlucky in that all three of my Personal LaserWriters now don't power up any more. I did have them sitting in a garage for a few years, so that could be why... If you do end up needing any parts for your LaserWriter, let me know...

Assuming it works when you swap the board with the NTX and it works, then yeah you'll want to replace the caps. It's the same as caps on mac boards - they leak and go out of range. There's plenty of threads on how best to do replacements, but I found the "twist" method worked well (I didn't pull...

What model of LaserWriter II is this? If it's a IIf or a IIg, then this is likely caused by the capacitors on the logic/controller board going bad. You'll see a combination of this error, and another where the green, paper out and paper jam lights are all on. Replacing the caps isn't tricky if...

@compu_85 - do you have a pinout or datasheet of the LaserWriter/LaserWriter Plus ROMs? I can't seem to find any information about them.

I would assume it doesn’t have erasable ROMs. I’ve never looked at the controller board, but my assumption is that it was upgraded from an original to a Plus in the 80s, and never touched since. (I’ve had it 10 years now.) I’ll have a look this weekend though. If it’s not got erasable ROMs, so...

That’s amazing! Thank you for sharing these! I now really want to downgrade my LaserWriter (which was previously upgraded to a Plus). Any tips on how I should do this? I know a bit about hardware, but not about ROM dumping or burning. Is there modern EEPROMs that would be drop in replacements?

I am looking for someone with a Personal LaserWriter NT and / or a Personal LaserWriter NTR to do a test for me. Specifically, download the LaserTalk software and see if it is able to connect to the printer. Additionally, if any individuals here are familiar with the LaserTalk software, I would...

User /u/royalmailpostpak on reddit pointed out that there's a LaserWriter Pro 810 for sale in Italy at the moment.

Yes, it was the 22uF 25v capacitor on the secondary board that I replaced. It was only today I noticed that there's also a 10uF 50v capacitor on that board too, but I didn't have a replacement for that so I just left it as is. For resistor values, I don't have a picture but I did write them...

The triac and capacitor arrived today, and after replacing them in the AC PSU (which Apple call the "Power Supply Block"), I'm delighted to report that I have a fully functioning LaserWriter II! I've had this printer sitting here for over three years now, so it's great to have it finally...

The triac I'm replacing it with is the Q6015L5TP which is a 600V 15A one I'm hoping will be suitable. The optoisolator is a "S21ME4 Sharp X7" and I'm not really knowledgable enough to figure out a suitable replacement for it. If anyone knows more about this or a suitable replacement, I'd be...

I've mentioned David Given's fantastic FluxEngine before, but I wanted to alert the community that as of the most recent release, FluxEngine can now write (as well as read) 800k Mac disks. If you're not aware, FluxEngine takes a regular 34-pin PC floppy drive, and by hooking it up to a ~$10...

Yes, the AC PSU. It has a triac to control voltage to the fuser, along with a single electrolytic capacitor. The key is to Google for "laserjet ii error 50" and there you'll find a few pages of people talking about this. Some people say the triac goes bad, others talk about the capacitor, and...

I've ordered a new Triac and capacitor for the PSU, and will report back once I've replaced them. Apparently those are the most likely parts that cause this issue. Here's hoping, anyway! I ordered them about a week ago but shipping here is very slow at the moment.

I have a LaserWriter II that I've been working on today. It wasn't picking up paper at all, but after putting a few rubber bands round the pickup roller it is now picking up paper with a 50% success ratio! Not great, but I'll take it for now! I'm able to print the service test page, which is...