Msg: 3397 *Conference*
11-12-92 10:08:50
From: DAVID PARKER WEST
To : DAVID BROWN
Subj: REPLY TO MSG #3321 (LCD)
To DAVID BROWN #5051 LCD: it is very likely that something other than the LCD per se is causing fading in & out of your M100 display. I recently bought a pre-owned M100 from Club100 in which display was, on arrival, quixotic: slowly or rapidly waxed & waned regardless of power supply, ambient temp, ambient vibration, & whether M100 was upside down, etc. Having 3 fully functional M100's, I simply interchanged "topHalves w lowerHalves". In all 3 combinations, display remained faulty as long as it was attached to lowerHalf bought fm Club100. Visual inspection & physical probing of lowerHalf circuitry revealed no likely solder problems. I interchanged 3 RAM chips wo effect. Interchanging the ROM likewise failed to cure the fade-in & fade-out. RickHanson suggested I phone John Cassacia, but I haven't yet. Reading serviceManual taught me tht there is 1 particular multipurpose companion chip -not CPU- which supports LCD & several othr functions whch may be @ fault, but its solder points seemed solid. Luckily for me, I am a heavy user of DVI, with which this otherwise useless M100 functions perfectly! At any rate, buying a new LCD wont help you.