Hi Andrew,
The LCD glass is electrically connected to the PCB via an elastomeric ‘zebra’ strip. This is sort of like a silicone rubber strip with stipes of conductive material embedded to make electrical contact. If something got under between the PCB and zebra strip it might cause an issue like this. The metal frame around the LCD is what applies pressure to hold things in place. You can apply a bit of pressure to the edges to see if it changes. Also, check you power supply voltages. If the -10V for the LCD is low, it could cause problems and perhaps some driver chips would be more sensitive to the low voltage than others? Jeff_Birt (Hey_Birt!) From: M100 <m100-boun...@lists.bitchin100.com> On Behalf Of Andrew Kennedy Sent: Tuesday, February 26, 2019 2:42 PM To: m100 <m100@lists.bitchin100.com> Subject: [M100] Lighter rows of pixels on LCD Hi folks, thanks again for the advice the other day. I just replaced my NiCd, which had a light amount of leakage on the barrel but didn't appear to have reached the PCB. I put a NiMh in there, and the computer is plugged in to charge it up for a while. However, when I turn it on I'm noticing an annoying defect, there are two bars on the screen whose pixels are lighter than the others. The bars are at rows 1&2, and 33&34, counting 0 as the first row. The pixels still turn black, just not as black as the other rows of pixels. I tried searching the mail archives but didn't find any discussion about this. Could it be that the new battery just needs to charge more? I'm going to reseat the ZIF cable, but if there are any other ideas please let me know. - Andrew
