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Apple Multiple Scan 15” Display (M2978) issues - LEDs cycling

TimHD

Well-known member
I acquired a later revision Apple Multiple Scan 15” Display - Model M2978, Nov 1995. (Ie this one is different to the model (M2943) you commonly see in the Apple manuals by this name, which was originally introduced in mid 1994.)

When the monitor powers on, the green LEDs below Horizonal/vertical centre/size indicators cycle from left to right continuously. The monitor's main power LED remains orange, and does not flick over to the ‘on’ green indicator as normally happens when a Mac boots up and sends images to the monitor.

Anyone have a manual for this older variant or could tell me what this means? Is it not getting a signal (this Model has a vga female port on back whereas the earlier model had no plug with the cable running from the back to the standard Mac DE15 monitor connector and I believe the connector I have is the right one.

 

TimHD

Well-known member
Update: Fixed. Seems that the DB15->VGA cable I had was a Radius one (might explain the cycling of the LEDs as they have special monitor cable usually). A replacement 'standard' Mac DB15->HD-15 (VGA) I bought has it working fine now.

 
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