Macintosh IICi SuperMac video Card

[macalle69]

Hello Folks !

I've got this Video card ( it was inside a Macintosh IICi with battery leakage on Mobo) I have tested this card on several other Macintosh I have ( CX, Ci, Macintosh IIFx and Quadra ) but every time same result video distorted as shown , I have also installed SuperMac software but no success 

Is Video Board damaged or maybe suggestions to fix this issue ? thank you !

 

[IlikeTech]

Can you try the svideo port?

 

[macalle69]

not able to try s-video port ,  I tried with 2 Macintosh monitor AppleColor High-Resolution RGB Monitor and Apple Color Display  

 

[joethezombie]

Try holding down the option key when you turn on the computer, and see if the card will cycle through refresh rates and resolutions and see if it will sync up.  If you get a usable picture, release the key.

 

[macalle69]

will try and let you know , now I'm looking for more infos about the card : it should be a SuperMac Spectrum 24 : https://www.worthpoint.com/worthopedia/supermac-spectrum-24-apple-mac-nubus-171272057

thank you 

 

[Trash80toHP_Mini]

Remove, clean contacts of sockets and legs of RAMDAC and ASICs? Then re-seat?

Have you checked LEM and everymac for info?

 

[macalle69]

Will try thank you folks for your supports !

 

[pb3623]

Try holding down the option key when you turn on the computer, and see if the card will cycle through refresh rates and resolutions and see if it will sync up.  If you get a usable picture, release the key.

If it's like the two Thunder/24s and Spectrum/24 I have, then it's slightly different - you hold down Option past Happy Mac (even through the Welcome screen) and it should dump you to a black screen and start the cycle, and you would press the space bar to accept the current resolution/sync rate and reboot.

Note, on my 950, sometimes the space bar doesn't register so be ready to just hit the reset key (from the inside of the case if you don't have the IIci key switches) just in case. 

 

[Trash80toHP_Mini]

Specs on OS and drivers tried on the machines should be oisted. Looks like a hardware issue to me, but I'm not an expert.

Use TattleTech or SlotInfo to verify card identity and ROM revision.