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K Service Source Video Cards K Service Source Troubleshooting Video Cards Troubleshooting General/ - 1 General The Symptom Charts included in this chapter will help you diagnose specific symptoms related to your product. Because cures are listed on the charts in the order of most likely solution, try the first cure first. Verify whether or not the product continues to exhibit the symptom. If the symptom persists, try the next cure. (Note: If you have replaced a module, reinstall the original module before you proceed to the next cure.) If you are not sure what the problem is, or if the Symptom Charts do not resolve the problem, refer to the Flowchart for the product family. For additional assistance, contact Apple Technical Support. Troubleshooting Symptom Charts/Video - 2 Symptom Charts Video Dark screen, bright 1 Reseat video card. screen without 2 Reseat RAM or VRAM SIMM on video card. recognizable 3 Check cable connections. information; or other 4 Run video diagnostic tests. video problems 5 Replace VRAM or DRAM (if socketed). 6 Replace video card. K Service Source Upgrades Video Cards Upgrades Video Card Upgrade - 1 Video Card Upgrade Before you begin, remove the video card. The Macintosh II Video Card upgrade requires 8 video RAM chips. Note: The required RAM chips are not available in an "upgrade kit." You must order the chips separately. The upgrade supports 8 bits per pixel and up to 256 colors or shades of gray. Upgrades Video Card Upgrade - 2 Caution: Review the ESD precautions in Bulletins/ Safety. Install the eight video RAM chips in locations B1, C1, D1, E1, G1, H1, G2, and H2 on the video card. Note: The notch at the end of each RAM chip should face the DB-15 connector on the rear of the card. Upgrades Two-Page Card Upgrade - 3 Two-Page Card Upgrade Before you begin, remove the video card. The Two-Page Monochrome Video Card upgrade requires 8 video RAM chips. Note: The required RAM chips are not available in an "upgrade kit." You must order the chips separately. The upgrade supports 4 bits per pixel and up to 16 shades