This Leading Edge Model D has an issue on the video output which is built onto the motherboard. Let's use some logical reasoning and deduction to figure out exactly which chip is bad to get this machine up and running again.
Links
PC Archeology Leading Edge Model D:
• PC archeology: Leading Edge Model D
My CGA Hacking/Snow video:
• Hacking an IBM CGA card for fun and s...
CGA card redux:
https://github.com/hkzlab/CGA_Redux
Great article on how CGA fonts work:
https://www.andavno.com/?p=499
Adrian's Digital Basement Merch store:
https://mystorec82bd22.creatorspr...
Adrian's Digital Basement ][ (Second Channel)
/ @adriansdigitalbasement2
Support the channel on Patreon:
/ adriansdigitalbasement
My GitHub repository:
https://github.com/misterblack1?tab=r...
Tools
Deoxit D5:
https://amzn.to/2VvOKy1
http://store.caig.com/s.nl/it.A/id.16...
ORing Pick Set: (I use these to lift chips off boards)
https://amzn.to/3a9x54J
Elenco Electronics LP560 Logic Probe:
https://amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
https://amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
https://www.rigolna.com/products/digi...
Head Worn Magnifying Goggles / Dual Lens FlipIn Head Magnifier:
https://amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
https://amzn.to/2wG4tlP
https://www.aliexpress.com/item/33000...
TS100 Soldering Iron:
https://amzn.to/2K36dJ5
https://www.ebay.com/itm/TS10065WMI...
EEVBlog 121GW Multimeter:
https://www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
https://amzn.to/2RDSDQw
https://www.ebay.com/itm/USBLogicDS...
Magnetic Screw Holder:
https://amzn.to/3b8LOhG
https://www.harborfreight.com/4inch...
Universal ZIP sockets: (clones, used on my ZIF64 test machine)
https://www.ebay.com/itm/14161820...
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
http://www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
https://www.ebay.com/itm/12510PCS...
Heat Sinks:
https://www.aliexpress.com/item/32537...
Little squeezy bottles: (available elsewhere too)
https://amzn.to/3b8LOOI
Instructional videos
My video on damagefree chip removal:
• How to remove chips without damaging ...
Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino