Apple IMAC User Manual - Page 101
Symptom Charts/ Video Problems - 19, Replace the CRT. - mac connection
UPC - 067540444435
View all Apple IMAC manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 101 highlights
Troubleshooting Symptom Charts/ Video Problems - 1 9 Solid gray screen, however, normal startup boot chime, power LED on, and the fan is running. 1 Reset parameter RAM. Hold down during startup. 2 Check that video/USB cable connections are secure between monitor, adapter, and computer. 3 Boot off the system CD that came with the unit. Do you see a normal screen display now? Yes: Reinstall system software. (You must use the system software CD that came with the unit to get the correct version of Mac OS with the appropriate iMac enablers.) No: Go to next step. 4 Reseat the internal RGB cable that attaches to the A/V interconnect board at J5. 5 Reset the CUDA chip and try again. If the problem persists, reset the logic board. (See "The CUDA Chip" and "Restarting the Logic Board" earlier in this chapter for instructions.) 6 Verify that the following cables are attached securely: • Internal video cable that attaches to the logic board at J16 and the A/V interconnect board at J2. • Internal RGB cable that attaches at the A/V interconnect board at J5 and the video board at P301. 7 Replace the analog/video board. Exchange like-for-like, there are two versions of the board. 8 Replace the internal video cable that attaches to the logic board at J16 and the A/V interconnect board at J2. 9 Replace the A/V interconnect board. 1 0 Replace the logic board. 1 1 Replace the internal RGB cable that connects at the A/V interconnect board at J5 and the video board at P301. 12 Replace the CRT. Replace like-for-like, there are two versions of the CRT.