On my machine it swings from about 1V to around 3.5V. The 1.25V is way too low I feel. Is there a good connection from T23 to pin 4? It sounds as if that line might be disconnect or there is a problem with the contrast voltage generation.
Is VR1 giving a good voltage input? From: M100 <m100-boun...@lists.bitchin100.com<mailto:m100-boun...@lists.bitchin100.com>> on behalf of "chadhendrick...@sbcglobal.net<mailto:chadhendrick...@sbcglobal.net>" <chadhendrick...@sbcglobal.net<mailto:chadhendrick...@sbcglobal.net>> Reply-To: <m...@bitchin100.com<mailto:m...@bitchin100.com>> Date: Monday, August 19, 2019 at 8:24 PM To: <m...@bitchin100.com<mailto:m...@bitchin100.com>> Subject: Re: [M100] M100 display not working, all else seems good With one lead on Pin 4 and one lead on GND, it is maxing out at about 1.25v and goes down to around zero. Is this acceptable? Thanks, Chad
