Backlight for thunderbolt display failing at full power
crwdns2934249:0crwdne2934249:0:
Just bought an Apple Thunderbolt display off Craigslist, 27” (A1407 2011 model). The backlighting on the display bugs out when it’s at full brightness (as far as I can tell, the display works as intended at half brightness). I got a deal on it - so I’m mainly wondering if it’s something simple that I can repair, or if I should try to run down the person I got it from for a refund?
'''As I increase brightness to much beyond halfway, a few things happen:'''
# A slight buzz sound. The volume increasing proportionate to the brightness.
# Intermittently flickers (less than 1 second going totally black, then back immediately) 3 - After a few minutes, it goes completely black (it’s just the backlighting for the LCD, it’s still connected, and if I shine a flashlight on the screen and move something, I can barely make out a dim existence of a non-backlit display).
# Unplugging the monitor from thunderbolt does nothing, only unplugging from power and then plugging back in will get the backlight to come back.
'''Things I’ve tried:'''
* Cycling power to devices
* Software updates ( Port Micro Firmware Version: 2.0.7, and Firmware Version: 26.2)
* Multiple different machines with and without uSB-c adapter
* Different thunderbolt cable (vs the built-in one)
* No other devices are plugged in besides power and thunderbolt.
Backlight for thunderbolt display failing at full power
crwdns2934249:0crwdne2934249:0:
Just bought an Apple Thunderbolt display off Craigslist, 27” (A1407 2011 model). The backlighting on the display bugs out when it’s at full brightness (as far as I can tell, the display works as intended at half brightness). I got a deal on it - so I’m mainly wondering if it’s something simple that I can repair, or if I should try to run down the person I got it from for a refund?
'''As I increase brightness to much beyond halfway, a few things happen:'''
# A slight buzz sound. The volume increasing proportionate to the brightness.
# Intermittently flickers (less than 1 second going totally black, then back immediately) 3 - After a few minutes, it goes completely black (it’s just the backlighting for the LCD, it’s still connected, and if I shine a flashlight on the screen and move something, I can barely make out a dim existence of a non-backlit display).
# Unplugging the monitor from thunderbolt does nothing, only unplugging from power and then plugging back in will get the backlight to come back.
'''Things I’ve tried:'''
* Cycling power to devices
* Software updates ( Port Micro Firmware Version: 2.0.7, and Firmware Version: 26.2)
* Multiple different machines with and without uSB-c adapter
* Different thunderbolt cable (vs the built-in one)
* No other devices are plugged in besides power and thunderbolt.