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当前版本: Dan ,

文本:

Take a flashlight placing it on the screen as a sharp angle to see if the faint image of your desktop and its icons are visible. If you do, your backlight logic need repairs. If not, then the GPU logic needs attention on the logic board.
I would recommend you start things by testing the logic board power feeds to make sure they are at the correct voltage.
=== Update (10/06/2018) ===
OK, heres the test points and the voltages you’ll need to see on the logic board power connector:
[image|1554876]
'''Pins 1 & 7''' PP24V_S5_PREFILT '''<<< 24 Volts'''
'''Pins 2 & 8''' GND_ACCD24 '''<<< Common'''
-'''Pins 3, 4, 9 & 10''' PP606
+'''Pins 3, 4, 9 & 10''' DC_12VIN '''neg''' '''<<< 12 Volts'''
-'''Pins 5 & 11''' DC_12VIN '''<<< 12 Volts'''
+'''Pins 5 & 11''' DC_12VIN '''pos''' '''<<< 12 Volts'''
'''Pin 6''' FAN_ON_IN_L
'''Pin 12''' NC_DCIN

状态:

open

编辑: Dan ,

文本:

Take a flashlight placing it on the screen as a sharp angle to see if the faint image of your desktop and its icons are visible. If you do, your backlight logic need repairs. If not, then the GPU logic needs attention on the logic board.
I would recommend you start things by testing the logic board power feeds to make sure they are at the correct voltage.
=== Update (10/06/2018) ===
OK, heres the test points and the voltages you’ll need to see on the logic board power connector:
-[image|1554870]
+[image|1554876]
'''Pins 1 & 7''' PP24V_S5_PREFILT '''<<< 24 Volts'''
'''Pins 2 & 8''' GND_ACCD24 '''<<< Common'''
'''Pins 3, 4, 9 & 10''' PP606
'''Pins 5 & 11''' DC_12VIN '''<<< 12 Volts'''
'''Pin 6''' FAN_ON_IN_L
'''Pin 12''' NC_DCIN

状态:

open

编辑: Dan ,

文本:

Take a flashlight placing it on the screen as a sharp angle to see if the faint image of your desktop and its icons are visible. If you do, your backlight logic need repairs. If not, then the GPU logic needs attention on the logic board.
I would recommend you start things by testing the logic board power feeds to make sure they are at the correct voltage.
+
+=== Update (10/06/2018) ===
+OK, heres the test points and the voltages you’ll need to see on the logic board power connector:
+
+[image|1554870]
+
+'''Pins 1 & 7''' PP24V_S5_PREFILT '''<<< 24 Volts'''
+
+'''Pins 2 & 8''' GND_ACCD24 '''<<< Common'''
+
+'''Pins 3, 4, 9 & 10''' PP606
+
+'''Pins 5 & 11''' DC_12VIN '''<<< 12 Volts'''
+
+'''Pin 6''' FAN_ON_IN_L
+
+'''Pin 12''' NC_DCIN

状态:

open

编辑: Dan ,

文本:

-Take a flashlight placing it on the screen as a sharp angle to see if the faint image of your desktop and its icons are visible. If you do, your backlight logic need repairs. If not then the GPU logic needs attention on the logic board. I would recommend you also test the logic board power feeds to make sure they are at the correct voltage.
+Take a flashlight placing it on the screen as a sharp angle to see if the faint image of your desktop and its icons are visible. If you do, your backlight logic need repairs. If not, then the GPU logic needs attention on the logic board.
+
+I would recommend you start things by testing the logic board power feeds to make sure they are at the correct voltage.

状态:

open

原帖由: Dan ,

文本:

Take a flashlight placing it on the screen as a sharp angle to see if the faint image of your desktop and its icons are visible. If you do, your backlight logic need repairs. If not then the GPU logic needs attention on the logic board. I would recommend you also test the logic board power feeds to make sure they are at the correct voltage.

状态:

open