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A 0,15 uF capacitor on the AC side of the power supply was the bad guy. 

Thanks, I'll try cleaning.  In the meantime the Duo was sitting 2-3 hours without power and when I powered it on again, the display didn't go to sleep for about 20-30 mins without pressing anything.  The fact is: the Duo was ok for several hours when I got it until the the power supply began...

Next update: When I let the Duo sit for about 20-30 min without any power it seems to recover itself: after power on the backlight comes normally, but disappears until I hold down the  brightness control button (up) and let it pressed all the time, the backlight comes back and stays...

New infos: PRAM battery disconnected: nothing changes.  When I let the Duo sit without power for a while, the light screen lasts for a view minutes, so I can see the booted desktop for 1 minute or so. Then it gets dark again. When I put in the main battery, the PB shuts off itself...

Hi, I got a very pretty PB Duo 270c today.  Everything works fine and so I started to check and format its hard disk using a SCSI-connection with my PowerBook 540c.  Hard disk seemed ok and so I started copying install files and more from 540c to Duo 270c.  Suddly I noticed brown smoke from...

As far as I know, Artmix is a one man company. I bought several items from him. 

Thanks, Techknight! 

Hi, I have to swap the analog board of my SE/30, so my question is: should I also exchange the (working) flyback on this "new" analog board or should I wait, if it'll be necessary. I'm asking, because I have a new built flyback from Artmix waiting in my cabinet. 

Here are many PDF books to download regarding Macintosh SE / SE/30 repairing: http://vintageapple.org/macbooks/

Ok, thanks!  :beige:

Hi, it seems, that my SE's hard drive data cable (of a working hard drive) was broken after several disassembling actions. It's spinning up, but the SE is showing a blinking floppy disk now. The SE still works with an external disk or ZIP drive.  As a SCSI2SD adapter is on its way, I want to...

I found this today and I think it could be useful for SE/30 newbies too.  :) https://www.ebay.co.uk/itm/Outstanding-1989-Apple-Macintosh-Mac-se-30-MAX-RAM-SCSI2SD-8gb-more-/302629103049?_mwBanner=1#vi__app-cvip-panel

Did you hold down reset and interrupt buttons for 5-10 seconds on the PB 180?

Look for 3.6Volts battery 110 (150) mAh Ni-MH (3x 1.2Volts): www.welovemacs.com/b4541.html https://www.amazon.de/dp/B001BSCXRI/ref=cm_sw_r_sms_awd_qgKTwb608ZF3E

I solved the same date/time problem on my PB 180c by replacing the interconnect board.  Additional bonus: some dead keys are also working again. 

This solution feeds my needs very well. Launching the hacked Disk Utility v13 and disabling Journaling is as fast as executing a Terminal command and I'm sure not unintentionally deleting the wrong disk. BTW: this solution is a replacement for a dead external hard disk, which was formatted with...

I suppose you didn't really read my posts, as I wrote that I "had to" work with Unix und "liked to" play with AmigaDOS. But that's gone and the times changed. No time & need to learn old stuff anymore.  I like to play with System 6 to Mac OS 9 computers. And that's the reason I like this...

Yes, yes and yes! This was the reason I switched to Macintosh computers in 1992. These computers were really user friendly! CLI computers are faraway from user friendlyness and nowadays only used by a small crowd of computer users. Using computers should not be a science for few people but fun...

HFS+ (non-journaled) works fine with my dm900 uHD satellite box. Files can be written from its Linux to the external HFS+ (non-journaled !) Mac hard disk. The internal hard disk of the satellite box is formatted in EXT4 as intended. BTW: not only CLI is retro, mouse & track-/touchpad will...