Fix Your Stuff Community Store

Model A1224 / Mid 2007 and Early 2008 / 2, 2.4, or 2.66 GHz Core 2 Duo processor

548 Questions View all

Options

Internal display not recognized

iMac 20-inch Early 2008

There is no picture at all on the iMac display. System Profiler shows no display being detected. Diagnostic LED 1, 2, 3 or on but 4 is off. A video signal is being generated as the desktop can be seen by logging in via Apple Remote Desktop. I haven't test an external monitor because I don't have the display adapter. I replaced the LVDS cable which had no effect. I'm assuming the display itself is bad.

Just looking for confirmation on this from anyone who has had a similar problem. If that's the case is the only feasible option to replace the LCD panel? Is it worth disassembling the LCD panel itself and testing/checking anything?

Here's a screenshot of System Profiler:

Hardware - Graphics/Displays

Answered! View the answer I have this problem too

Is this a good question?

Yes No
Score -1
1 Comment

As I mentioned I replaced the LVDS cable which had no effect.

I cannot see a picture at all on the display, completely black. Holding a flashlight up to it shows nothing either. That leads me to believe it's not just a backlight issue.

by

Add a comment

2 Answers

Filter by:
Most Helpful Newest Oldest
Chosen Solution

Options

I would check it with an external monitor before replacing the display. If you can see the desktop at all, then it's most likely the inverter not the display. Here's how to replace the display: iMac Intel 20" EMC 2133 and 2210 Display Panel Replacement

It's certainly worth doing but you may have to do some searching for a good price.

Was this answer helpful?

Yes No
Score 2

1 Comment:

I ordered a mini-DVI connector so I can test an external display. In the meantime I tested LVDS connector on the logic board and I have a question. Here are detailed specs on this LCD panel - http://www.50amp.com/imac/LM201WE3-TLF1....

Page 9 shows the pinout for the LVDS cable connector. Pins 28,29,30 supply 5v to the panel. With the computer on those pins on the logic board connector read 0v, so no power is being supplied to the panel apparently. However what I don't know is if a voltage should be on those pins at all times or if the supply voltage is dependent on some other factor. If the inverter is bad for example, would that have any affect on whether or not power is supplied to the LCD panel?

by

Add a comment

Options

It sounds like you might have an error with your display cable. I would try checking to see if any of the display cable internally has melted or if the connector has come loose. You can use this manuel if you want to check the internals:

iMac Intel 20" EMC 2266 Display Panel Replacement

Hope this helps.

Was this answer helpful?

Yes No
Score 0
Add a comment

Add your answer

Chris will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 0

All Time: 1,243