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Oh and according to that Thanks but it's more stubborness rather than dedication :)

I found a great guide to refurbishing the HP Laserjet 4L printer, which as far as I understand is the same printer under the hood. This has a lot of things to clean that I never did before. So I think a fifth tear down is in order. Oh what I thought was a field sensor is actually an optical...

Aha! After posting that I stripped it down a fourth time. This time I noticed a bit of plastic in my parts box that I'd gone and missed three times before! When the printer is the correct way up that goes between a field sensor on the controller board. I guess to stop you using the printer...

I would say I'd buy a few of those myself. However, I think I've gone and broken the printer! It was not feeding properly, so I took it apart (using the proper instructions in the manual) and cleaned all parts. I also got a rubber roller rejuvanator (AF Platenclene Cleaning Solution). However...

I did come across an Alibaba listing for some wiper blades. $0.70/0.90 each. Cheap but I guess shipping is going to make that unit cost quite a bit higher!

Here's the same print as the first one. So pretty far from perfect, but a massive improvement. Shame that even my keyboard is covered in toner... I'm really, really glad I wore a mask! (A decent half mask respirator!).

So I had a go at "renovating" the wiper blade. I found this YT video that shows it's actually pretty easy to remove the two halves of the cartridge. So removing one screw turning over loosing four tabs, then with a couple of large flat headed screwdrivers (levers would be better!) prying the...

According to this thread by @beachycove then the wiper blade can be improved by just heating and cooling. I guess I may as well give it a go!

Sorry I see you actually wrote that the wipers deterioate! I guess my only option is to get a toner cartridge that has a new wiper blade added. I did see that Alibaba do sell the wiper blades so I guess there's a market for remanufactured ones! Thanks again for putting me on the right path.

From googling the "HP Laserjet 4P/4L" it appears that the elasticity of the rubber wiper blade does deterioate so if these are nearly twenty years old I guess that's the issue!

Many thanks for that. The drum is covered in toner. Both the old toner catridge and the new one. From the manual I found the wiper is inside the cartridge though? Is that correct? Have I just been unlucky and both cartridges are failing? The cartridge was unwrapped but it had the plastic strip...

I bought a LaserWriter 4/600 PS pretty cheap off ebay. The ad says it was in poor condition but powered on. So I took a gamble. Sure enough it looked pretty dirty but powered up fine and immediately connected to my AppleTalk network. However, for printing it left dirty streaks on both sides of...

I just had another play with Compact Virtual. I tried MacTCP with the DaynaPort drivers since the SE has a BlueSCSI. With the Compact Virtual EXTEND MEMORY option toggled on this also fails to work (for me!). But if I toggle it OFF Appletalk and TCPIP work fine. Also the Gemstart 3.0 extension...

I saw that some clever sleuth (@David Cook) has unearthed some more recent Accelerator drivers - Gemstart 3.0 that were designed for 7.1. I gave these a spin. They work fine for enabling the accelerator, but unfortunately they show the exact same issues.

Thanks for that! Interesting.

Thanks. I ran the installer. It asked me what card was in there. The closest one was a Micromac one but I cannot actually remember which one! I will rerun the installer.

So on the tried and tested method of "if it does not work one way, try the other" I moved the Virtual extension to load after the MMPerformer extension. The first time it restarted after loading the MM Performer extension. But on the second boot is loaded up fine. Unfortunately it did not make a...

My apologies. It's loading first! Not sure why as there's nothing special about the naming. As far as I understand extension are loaded in alphabetical order?

Thanks. It's loading afterwards. Should it load before? I've tried changing the loading order of the Appletallk patch extension and the MM Performer one but not the Virtual extension.

Has anybody tried this and got it working OK? Lots of different threads suggest it works fine with many different accelerator cards. Plus I saw MicroMac's own pages suggest you try it. However, when I've tried it everything seems to work fine and Finder shows the virtual "ram". However, there...