Search results

0.5 and 0.06

they all look ok and measure fine

Ok this one is a weird one Customer brings in mbp 820-3115 states DVD got stuck into drive and thought it would be simple enough to take out drive and force stuck dvd out. takes out DVD and now the computer doesnt recognize when ac adapter is plugged in and when you turn on via power button...

r6860 wasnt outputting correct resistance. dont think it was cause of it. this board alot of corrosion in that area. but yes it is solved. thanks louis

i have a clients board. something got stuck in headphone jack. and sound was not working either. when you toggle the volume up and down it would have the forbidden sign. replaced jack. and sound works fine. no more forbidden sign. laptop can see headphone jack when i plug it in when the computer...

Yes. It was the led driver. Thank you. And Louis, my battery was dead. Thank you very much Aprendiz. There was nothing wrong you did. I really appreciate your help. I learned a few things I didn't know before.

thanks guys ill replace it tomorrow

r9741 is showing 5 ohms. i was wondering if that has relation to the no backlight or does that relate to something else also i saw some corrosion on q9707... very minor but now pin 5 is getting 3.3v PPBUS_SW_LCDBKLT_PWR=8.36v now. dont know what happen but these voltages are coming through...

0.39 something to 0.5. i was putting the probes the other way. yes 0.39

diode mode red probe to ground pin 5 from Q9707 = 0.5to 1v in diode mode

yes d9701 = 7.74v

3.3 LCDBKLT_PWR 8.36LCD_BKLT_EN 3.3v- BKLT_PLT_RST_L

bkl_en measured on r9715 2.7v bkl_pwm on r9704 - 3v from a5 probe to c9796 there is continuity

thanks ill look in it

7.74v. i put flashlight on apple logo on back and see harddrives when i press option

i have a 820-3209 macbook air logic board. liquid damaged... no backlight. did ultrasonic cleaning and measured fuse. fuse is ok. damage was main on LED driver. i was wondering what would be the diagnostic steps to know where the issue might be . thanks in advance