820-2533-B Hd not detected?

[Dewanbd]

Hi,
Unit works with usb external HD. Tried good know hd cable and HD. Not booting unlimited spinning with good known HD.
The measurement of J4501 are as following:
SMBUS_SMC_MGMT_SCL p7=3v
PP5V_S0_HDD_FLT p9,11=5v
PP1V5_S0_HDD_FLT, p8=5v
PP5V_S0_HDD_FLT,p10,12=5v
Any help please.Thanks.

 

[2informaticos]

"PP1V5_S0_HDD_FLT, p8=5v"
Are you sure???
It comes from PP1V5_S0; is L4502 OK?

Check FL4501/02 and C4510/11/15/16.
Also check all traces from that area.

 

[Dewanbd]

I found the cable was faulty. It works fine now. Thank.