Hardware How is LCD powered?

B_N_B

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Hi all,

Would anyone happen to have any info on how the LCD is powered by the Switch.
I'm aware IC 8316 to the left of the LCD connector provides the 5v/-5v, but I'm also reading -7v on another LCD pin and I can't figure out where it's coming from.
Long story short, I've replaced the M92T36 and MAX77621 to get the unit to turn on, but I'm getting no image -only backlight. I can hear sounds, so I'm sure it's running, but it's not displaying anything.
IC 8316 is not outputting the 5v/-5v despite receiving the 1.8v signal, so it may be the culprit, but it would be nice to know where else the LCD gets its power from.

THanks for your help!
 
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    KenniesNewName @ KenniesNewName: 10 year old hardware now still emulates switch pretty decently