Skip to main content

Model A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5 or 2.8 GHz Core i7 Processor

432 Questions View all

Error in Diagnostics 4SNS/C0000008: TLOp--124

Hi

I have the above error in diagnostics. It appears to point to LCD Temperature Sensor. I have tested another LCD with my Mac and it isn't the LCD itself. This results in fans running at full speed as well as LCD Proximity reading as - in istat menu app.

Any help would be appreciated

Thank you

Answered! View the answer I have this problem too

Is this a good question?

Score 0
Add a comment

2 Answers

Chosen Solution

The error TLOp points to: ''Excessive LCD panel area temperature, Verify that the DisplayPort cable is securely connected to both the LCD panel and the logic board. This is straight out of the Apple manual.

I would say since you tried a second display and it too showed the error that points to the LVDS connector on the logic board its self the contact within it has a problem, the solder joint of the connector or the rest of the sensor logic within the logic board needs to be investigated.

Was this answer helpful?

Score 1
Add a comment

I would first check that the the LCD thermal sensor cable connector is correctly in place. See step #8 of this guide:

iMac Intel 21.5" EMC 2428 Display Replacement

Was this answer helpful?

Score 1

1 Comment:

The thermal sensor cable and connector looks fine. I've examined the pins inside the connector too and they look fine.

I do suspect the lvds connector now that Dan has mentioned it. There's a pin that looks slightly out but because it was working I didn't suspect it. But the more closely I examine it the more I think it is the LVDS connector on the logic board.

by

Add a comment

Add your answer

Faisal Gondal will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 8

All Time: 394