The power supply can be built using project files and gerber files attached in file list of this project.

BOM (a list with product names will be prepared too)

• Cables desoldered from original power supply
• D36V50F5 DC-DC converter
• 2x D24V22F12 DC-DC converter
• LC-MC34063A-NV negative voltage converter module
• L7905 TO-220 negative -5V voltage stabilizer
• 680uF/35V low ESR capacitor (note: capacitor values are not necessairly critical, and are probably overspecced a bit)
• 2x 330uF/25V low ESR capacitor
• 1200uF/10V low ESR capacitor
• 2x 820uF/25V low ESR capacitor
• 1x 390uF/10V low ESR capacitors
• 1x 10uF/25V electrolytic capacitor
• 3x 10uF/25V 1206 SMD capacitors
• 7x 1uF/50V 1206 SMD capacitors
• 33V TVS SMC unidirectional
• 12V TVS SMC unidirectional
• 12V TVS SMB unidirectional
• 5V TVS SMC unidirectional
• 5V TVS SMB unidirectional
• 2x 2k2 1206 SMD resistor
• 22k 1206 SMD resistor
• 150R 1206 SMD resistor
• 2k7 1206 SMD resistor
• SOD-123 Schottky diode
• 3x BAT85 Schottky diode
• BC818 SOT-23 transistor
• 5A polymer fuse (THT)
• 250mA polymer fuse (THT)
• 5.5/2.5 DC barrel jack
• 2.54mm 2-pin fan header
• Power switch

The LCD adapter board can be built using project files and gerber files attached in file list of this project.

BOM:

• 2x18pin 2.0mm pitch angled pin header
• 32pin 0.5mm FPC connector (Hirose_FH12-32S-0.5SH_1x32-1MP_P0.50mm)
• Optional 1206 1k SMD resistors used as jumpers for left/right or up/down image rotation/mirroring

3D printable adapters for LCD mount and the barrel jack DC connector can be printed using STL files attached in project repository.

An ISA wireless network card can be built using a small OpenWRT router module attached to a typical ISA ethernet card.

I used a generic NE2000 compatible ISA card and small A5V11 router module, which can be flashed with OpenWRT (https://openwrt.org/toh/unbranded/a5-v11).

The connection between ISA card and wireless module can be simply made with a short and flexible RJ45 cable. The original bracket needs to be replaced with a 3D printed one, which can hold the router module and expose its USB port. 3D-printable files are attached in "Files" section (isa_wifi_mholder1.stl, isa_wifi_3dbracket1.stl).

Power needs to be connected with a 500mA polyfuse and a angled micro-USB connector. +5V and GND pads on the network card can be used.

I published OpenWRT and MS-DOS network configuration details in the external repository: https://github.com/adbrt/dos-wifi-solutions/

To run the computer off USB-C, a small module called "USB-C PD trigger" is needed. They are easily obtainable in various places. One with 15V or 20V pre-set voltage is needed (this laptop accepts wide input voltage range). It might be necessary to also solder a small low-ESR capacitor between the output terminals, because otherwise the initial inrush current may cause the powerbank to shut down. I added a 25V, 330uF Panasonic FR capacitor.