Take a look at the image, there is a blue wire soldered near ULN2003 and a red one area of D3, what does it do? the other end has them tied together.
Bridged chat on:
Please support the defense of Ukraine.
Credit card, bank transfer
Bitcoin, Ethereum, Polkadot, USDT
via Unclutter App for Mac
Active forum topics
No Social Media.
All Content Locally Hosted.
Two Terabytes and Growing.
Built on Free Software.
We have complied with zero government requests for information.
Looks to me like former cables to read/write protect switch....
is there a hole in front plate with missing switch ?
Does the disk have write protect disabled even if notch at disk is closed by tape or writeprotect label and
the sensor should indicate write protection ( i.e. Write permanent enabled ) ?
If not sure check pages at:
and check there details about write protect switch.
On this Disk ][ the other end of the wire is just twisted together. No other modifications. I make it a habit to open up all ebay hardware to see what I am really working with. I find all sorts of "things" and learn a lot.
I have a 20$ apple //e motherboard and keyboard showing up tomorrow that they previous owner said it gives a checkerboard on the monitor, no beep no logo.. So I hope to have some fun working through the Apple II Plus/IIe troubleshooting and repair guide to see if I can get it to beep.