Macintosh LC – motherboard
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Apple
Yamaha A3000
INTRO: Yamaha A3000 sampler, in condition: working.Requires replacement of encoders, which are damaged.Replacements have been ordered. yamaha-a3000_2 yamaha-a3000_3 yamaha-a3000_4 yamaha-a3000_5 Repleacement: Encoders have been replaced. Now the sampler works properly.
Commodore Amiga 600
INTRO: This time an Amiga 600 in unknown condition with a power supply (condition also unknown) was brought to the service. Depending on the customer’s wishes, a partial or complete restoration of the computer will be carried out. Recap: I did the regeneration of paths and pads damaged by spilled capacitors.I performed a recap of all capacitorsAmiga came to life 🙂 IMG_3871 IMG_3872 IMG_3873 IMG_4068-1
TIMEX 2048
INTRO: The computer was purchased in an unknown condition. After initial inspection it was found, all distances in the case allowing it to be screwed together broken, damage to the keyboard ribbon, damaged power connector and video output. First run: Despite the damaged connectors, the computer managed to boot up 🙂Great nostalgia and joy to see again after 30 years the familiar inscription after turning on the computer 🙂It was confirmed that the keyboard tape was damaged, only part of it works. Keyboard ribbon: Fortunately, there are connectors available to build a new keyboard ribbon. I used 14-pin multi-color IDC ribbon to connect them.Now the keyboard works like new 🙂 timex-2048_3 timex-2048_4 timex-2048_5 timex-2048_6 Case: All the brackets of the case used to bolt it together are damaged timex-2048_10 timex-2048_9 timex-2048_7 timex-2048_8
Monitor Samsung SyncMaster 941MP
Issues: The image on the monitor streaks and a beeping sound can be heard, which means that the power section is not working properly. Usually secondary-side capacitors are the culprit, but in this case the main culprit seems to be the high-voltage 100uf 450V capacitor, which can be seen in the photo. Capacitor C204 – 47uf 35V – also looks suspicious. Samsung-SyncMaster-941MP-psu-issues1 Samsung-SyncMaster-941MP-psu-issues2 Final result: All capacitors have been replaced. The picture has improved, it is more stable and the beeping is gone
Atari 1040 STE
Intro: One day a friend of mine boasted that he had a complete Atari STE that he was going to run and an STE motherboard in unknown condition rescued from the trash. We agreed that if he got his Atari running I would buy this motherboard back from him. This is what happened 🙂In what condition the colleague received it you can see in the photo above. To me it arrived cleaned of course 🙂The whole thing consisted of a broken lower case, bent lower screen, motherboard and power supply. Time to make the dream of owning an Atari ST come true! Let’s get to work! 🙂 General view: atari-ste-motherboard1 atari-ste-motherboard2 atari-ste-motherboard3 atari-ste-motherboard4 atari-ste-motherboard5 atari-ste-motherboard6 atari-ste-motherboard7 atari-ste-motherboard8 PSU: Unfortunately, the power supply was in very bad condition. capacitors bore traces of screwdriver hits and after the bridge rectifier only wires remained .After soldering them, it turned out that the PCB is cracked in many places, the tracks are torn and many solder pads are broken.I decided to replace the PSU with another one because of the amount of damage. Atari requires only two voltages +12V and +5V so I decided to use the PSU from Amiga to try to run the motherboard, and for this purpose I made a suitable adapter: amiga power connector – atari power connector. atari-ste-psu1 atari-ste-psu2 atari-ste-psu3 atari-ste-psu4 atari-ste-psu5 atari-ste-psu6 First run: From the very beginning, Atari did as much to spite me as it could. After deep cleaning the motherboard and checking for short circuits, I decided to try to get the motherboard working. With the computer I received only three RAM modules of 256KB each. On three modules as expected the computer did not want to work. but after placing two RAM modules in the 1st and 3rd slots…. …the computer came to life 🙂 There was hope that the computer could be saved …. Keyboard: The keyboard is a completely separate story….I purchased a keyboard in unknown condition in QWERTY layout.After connecting it to the computer, of course, it turned out that it does not work….It could not be otherwise.It turned out that instead of the keyboard controller chip, someone inserted a TIA graphics chip from an Atari 2600….I purchased the original HD6301V1P chip, the keyboard came to life but unfortunately only some of the keys worked.The DB9 connector of the mouse had all the solders broken off, the keyboard ribbon connector and several pads also needed to be soldered.The pads under the keys were thoroughly cleaned, the rubber bands also and the keyboard came to life.after cleaning it looks like new 🙂 Keyboard before cleaning Keyboard before cleaning Soldering pads for re-soldering Soldering pads for re-soldering Test before Test after CASE Another problem to solve was the lack of housing. Getting an original case for the STE is a difficult task. Fortunately, we managed to find someone who makes very high quality cases made with 3D printing technology.The case looks great. The surprise was the included set of screws to screw on the motherboard and PSU. Sockets The following have been replaced: modem socket, hdd socket, both midi sockets, reset button, fdd socket and actually soldered tape was replaced with a standard fdd connector + new tape. the snagged solders were corrected Computer rebuilding / Upgrades: In order to get the computer back to its original state, I had to complete quite a few parts: PSU keyboard floppy disk drive case 4MB RAM TOS version 2.06 UK several slots because they were either damaged or in poor condition ASCI2STM usb / ps2 mouse adapter RGB2VGAadapter for high resolution atari-ste-psu-fdd atari-ste-tos-206 atari-ste-tos-ram In order to get the computer back to its original state, I had to complete quite a few parts: PSU keyboard floppy disk drive case 4MB RAM TOS version 2.06 UK several slots because they were either damaged or in poor condition ASCI2STM usb / ps2 mouse adapter RGB2VGAadapter for high resolution FINAL RESULT
Macintosh LC
Intro: In the early 90s when, as a teenager, I read tests of this computer in trade magazines I really wanted to own one someday. I was captivated by the design, the operating system, the performance. At that time I myself owned, if I remember correctly, a Timex 2048 and an FDD3000 disk drive. Dreams come true, I received a Macintosh LC from a friend. The computer turned on but had problems with the image. i decided to restore it. REPAIR Issues: Incorrect image display Done: full recap of the motherboard repair of damaged tracks Cleaning and retrobrighting of the case Result: The displayed image is still not correct. the probably culprit is the VRAM. Unfortunately, I don’t have the right VRAM module at the moment, because the newer models I own have different modules.
