Swap the leads around on the meter :) the black wire to the -ve voltage and the red to gnd.
You could also try a cold boot, just in case. Hold ctrl-break and power on. The NiCd battery is in good health? ________________________________ From: M100 <[email protected]> on behalf of Nathan Misner <[email protected]> Sent: Saturday, July 21, 2018 23:42 To: [email protected] Subject: Re: [M100] Model 100 LCD doesn't work This is turning out to be "fun". The screen used to not do anything but after replacing my patch wire the screen is still blank (don't think it's black, only turns grayish when I push the contrast up all the way) but I'm able to manipulate the contrast and I'm no longer able to make the computer beep. I'm not really equipped to measure negative voltage (only have an analog meter), but VDD measures 5V and VEE makes the meter's needle go as left as possible, when before the patch wire it measured around +0.2 volts.
