|Fabrikant|| GRiD Systems Corporation |
|Datum opname collectie||14 februari 2020|
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A heavy-duty laptop, 80286 based, MS-DOS compatible. Includes a plasma screen, 1.44 MB floppy disk drive and a 40 MB hard disk drive.
Information about the machine:en.
Information about the manufacturer:
The device, as a portable computer was able to run off a battery pack, an external power supply and an internal power supply, that replaces the battery pack. Obviously, as an 80's system, it contained the infamous RIFA capacitors.
denz replaced two capacitors with new ones. One had already failed, the other one was cracked.
Testing the powersupply after replacing the capacitors gave an open circuit voltage of 16.26 Volt (0.01 V above the nominal 16.25). No current and load tests have been done (do we have a load tester for about 80 Watt?)
After repairing the powersupply, the computer still failed to start. The status LEDs near the keyboard flashed about once a second (very low intensity, we turned off the overhead lights to be able to see it). To [[User:Denz|denz] it seemed like a powersupply issue.
Stoneshop and denz took the device apart to look for visible damage to the parts, were a bit astounded by the engineering quality of the device, and the (in our view illogical) way parts of the system were laid out on the mainboard.
We couldn't find any obvious damage to mainboard and additional boards and parts.
At the moment the machine is disassembled, waiting for parts to be cleaned, and further (microscopic) inspection of powersupply and other parts still has to be done.