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New sata cable in but unfortunately, same thing happens.
Dont know which direction to go here really?
Constantly pressing on the keyboard somehow makes it boot, I am guessing I am draining something by pressing??? Its a real mystery for me
BTW, I can boot via usb from the same disk, so I am...
Yes, installed os on a new ssd, have not tried a new sata cable but I cant see that this would do it
Once it gets going it will work forever, shutting down, restarting etc all works. Only when i leave it off for a couple of hours it goes back to this cutting off
I can boot into recovery with no...
Hi
Strange one.
Works perfectly when booting to recovery or usb stick, but cots the power on normal boot, the moment a first bit of the progress bar gets filled.
Did smc, vram reset, new os instalation - it seems to work then. But after cooling off (next day ie) it happens again.
Checked the...
I am too ignorant to understand what is the source of this issue. My uneducated guess would be the backlight driver(?) Can change it again
Please assist
Yeah, the ones I did last Sunday, I thought you were asking about voltages now sorry
I just checked other BLK_isense in diode mode and they are 0.614 but this one is 0
Hi, thanks for the message
XW7720, all in order continuity present from pin 5 of U7701 and to D7701
U7701 voltages
3 - 2.84 V
4 - 2.57 V
11 - 5.12 V
14 - 3.34 V
Cheers
Hi again,
Replaced the U7701 as well as F7700, also changed D7701 as it was showing same voltage on both ends
now - still no backlight
U7701 readings
1 - GND 0
2 - GND 0
3 - 2.865
4 - 0.559
5 - 0.636
6 - 0.427
7 - 0.427
8 - 2.952
9 - 0
10 - 0
11 - 0.461
12 - 2.655
13 - 0...
ok
U7701
Pins
1 0.002
2 0.002
3 0.564
4 0.0
5 started burning - most likely I put the wrong probe on but cant say as I dropped it
disconnected from power and rechecked the f7700, will have to replace it again
Pin 4 is now in -1.8
Just thinking - was my mistake measuring it while powered on?
JohnB8812 F7700 was fine but I accidentally killed it after taking the measurement
2informaticos PIN 2 according to the schematics, the other pin was 0v