[SOLVED]820-2915 No power to HDD

[RyanLEN]

I have an 820-2915 that had a fried SATA cable. Changed the cable and still no spin from drive.

L4500 - 5V
c4510 - 1.1
c4511 - 1.1
c4534 - 0
c4533 - 0
fl4501 - 0

U4510
pn 4 1V
pn 5 1V
pn 6 1.5V
pn16 1.5V

Thanks in advance for any insight.

 

[dukefawks]

Did you measure on both sides of L4500? Was the cable damaged, these normally don't fail. I assume you tried with a known good HDD.

 

[RyanLEN]

hi. yes. both sides L4500 are 5V's. the old cable smelled burned. The hard drive Im using boots to MacOS via USB. Also, and not sure if this is related yet. computer only starts up with battery. Will charge and stay running with magsafe. But will only boot with battery. Thanks for your response. Appreciate it.

 

[dukefawks]

You are not using an original 85W charger, but that will not affect the HDD of course.

Beep out the 4 SATA data lines from the HDD connector to C4533,34,35,36. Could be another bad cable or bad connector. Also check if 5V makes it to the HDD connector.

 

[RyanLEN]

Pins 1, 9, 10, 11, 12 all have 5v's. all 4 SATA lines seem to have connectivity. 17 to C4533, 19 34, 18 to 36 and 20 to 35.

 

[RyanLEN]

l4500 looks kinda crappy. Tiny solder balls hanging off it, little burnt on the bottom near the board but it seams to be working fine.

 

[dukefawks]

L4500 could be half fried and have resistance, it will drop voltage once it passes some current. Check with HDD connected if the voltage drops or just replace it.

 

[RyanLEN]

Replaced L4500 this morning. HDD spins. Thank you for your help. Appreciate it.