PC AT
Serial: DA4 001394
The unit was in an extremely poor and abandoned conditon. Heavy corrosion on the case, inside and outside. The backside was deformed, the plastic port cover was damaged, the paint underneath it and 5mm around it came off just from looking at it. The slot metal thingy of the controller card was deformed.
It had no PSU and no HDD. All was extremely dirty with some thick oily black stuff, also inside the FDD.
The additional 3,5″ 1,44MB FDD which it came with could never have worked in that machine, the BIOS version that was installed was too old for 3,5″ HDD floppy drives.
- Mainboard: NBI 4200:
- Processor: 80286
- Processor Speed: 10MHz
- Onboard Memory: 1MB [512kB/512kB]
- BIOS: Award
- NPU Options: 80287 [none installed]
- Video Card: ATI CW16800-A (Graphics Solution)
- Data Bus: 8-bit ISA
- 64K DRAM
- Video Types Supported: Monochrome, MDA, CGA
- Floppies:
- A: Chinon 3,5″ HD 1,44MB
- B: Toshiba ND-08DE 5,25″ HD 1,2MB ?????????
- HDD: NEC D5126:
- Interface: MFM
- Physical Size: 5.25″ HH
- Capacity: 20MB
- BIOS Type 2
- work performed:
- whole machine completely dismantled and cleaned
- corrosion on case treated, inside repainted
- damaged plastic port cover removed, 10mm of the paint around the port openings came off
- corrosion on the backside treated, repainted around the open ports with exact same color [look closely]
- plastic port cover replaced
- sticky tape / markings removed on the back
- 5,25″ floppy drive completely disassembled and insides cleaned from thick black oily gunk
- motherboard and all expansion cards recapped, all tantalums replaced with Rubycon aluminum caps
- missing metal slot covers replaced, all restored to former shine and glory
- missing PSU replaced and recapped with Rubycon 105° caps
- missing hard drive replaced with an “original” one which was used in these machines from factory. It already had data on it, which was left intact. Just the MS-DOS version was updated from 6.20 to 6.22 because the 6.20 version was not completely installed
- new BIOS installed which now supports the 1,44MB 3,5″ FDD [original EPROMs left inside in a bag]
- dent in cover metal sheet buffed out and repainted
- small spots on metal cover repainted, especially around the screw holes
- small spots on FDD lever repainted
- front bezel main label reglued [top-left corner came off]
- HDD backup [Ghost 2]
- notes:
- 5,25″ floppy bezel and lever seem to be spray painted from factory [the inside is black], so no yellowing.
- front bezel is also not yellowed at all, so one may assume it was also spray painted from factory
tantalum action: