Blank Monitor

6 posts / 0 new
Last post
Offline
Last seen: 13 years 6 months ago
Joined: Dec 18 2004 - 15:45
Blank Monitor

I recently brought my first MAC and it is an iMAC 233 Rev A. It had 8.5 OS installed on it. I also brought OS X and tried to install without installing the lastest firmware. Now all I get is the power indictation and boot up chime but nothing on the monitor. Is there a way to reset the system? How do I get the monitor back? :?

Barry's picture
Offline
Last seen: 9 years 6 months ago
Joined: Dec 20 2003 - 10:38
Do you have an os 9 cd? It n

Do you have an os 9 cd? It needs to be installed before you can install the firmware update. Might have to pull the hard drive as well. I've never gone straight to X from 8.

Offline
Last seen: 13 years 6 months ago
Joined: Dec 18 2004 - 15:45
Blank monitor

Only have OS X cds. I had to order original cds last night. 8.1 and will go from there. Thanks for the help.

Shawn

-Wallstreet-'s picture
Offline
Last seen: 11 years 2 weeks ago
Joined: Dec 26 2003 - 16:21
I don't think that the Rev. A

I don't think that the Rev. A-D iMacs needed a firmware update for OS X. My best guess is that you tried to install OS X without enough RAM, and now it just won't boot to the point where the screen comes on. Reinstall a classic OS, then upgrade the RAM, and then if you're really brave and patient, install OS X. But be prepared for it to be very SLOW.

Barry's picture
Offline
Last seen: 9 years 6 months ago
Joined: Dec 20 2003 - 10:38
It will run X okay, with enou

It will run X okay, with enough ram. Just replaced an analogue video board in one last week running 10.2.8

Zydeco's picture
Offline
Last seen: 5 years 3 months ago
Joined: Dec 26 2003 - 16:21
Firmware Update

It is a problem with rev A-D iMacs, they need a firmware update for Mac OS X to recognize the screen, but the Mac OS X installer doesn't check.
The mac will boot correctly, but with no video.
If you can install OS 8 or 9 back on it, you can update the firmware and then Mac OS X will work correctly.
I have used OSX (from 10.1 to 10.3) on a Rev A iMac with first 160 and then 384 MB of RAM, and it wasn't that slow (well, 10.1 with 160 MB was, but the others were perfectly usable)

Log in or register to post comments