HP 15-ay010nt - Power Surge On Hub Port

Brand : HP
Model : 15-ay010nt
Motherboard : BDL50 LA-D704P Rev: 1.0 (2016-03-02)

Power Surge On Hub Port

USBs are not working. It doesn't see it with F9

While Working
PJB1 19.5V
PJW2 0V
PJB4 3.3V
PJP2 3.6V
PJP11 5V
PJB9 1.77V
PLV2 0V
PLV3 0V
PL1203 0V
PL1205 0.10V - 0.67V between goes up and down
PL1206 0.95V
PL602 1V

flash memory idle when not inserted
VBus 5V / -d 0.39V / +d 0.40V

PJP2 21.5 Ω
PJP11 600 kΩ
PLV2 33 Ω

ismailakyoltr wrote:PJP2 21.5 Ω

Hello!
This resistance is definitely too low.
Unfortunately, the PCH part (small core) of the APU hybrid is damaged almost for sure.

Set your multimeter to the diode test mode and measure the voltage drops to ground on data lines of all USB ports (pins 2, 3 of USB 2.0 ports and pins 2, 3, 5, 6 of USB 3.0 ports).
USB 3.0 port pinout:

matic wrote:Set your multimeter to the diode test mode and measure the voltage drops to ground on data lines of all USB ports (pins 2, 3 of USB 2.0 ports and pins 2, 3, 5, 6 of USB 3.0 ports).
USB 3.0 port pinout:

USB 2.0 (2.pin 598 / 3.pin 598)
USB 3.0 (2.pin 593 / 3.pin 594 / 5.pin 793 / 6.pin 793)

By the way, the product belongs to me. If there is any risky transaction, I can try it.

PJP2 21.5 Ω (I disconnected the jumper, PU2 value is normal, low resistance is on the other side.)

Also measure the voltage drops to ground on data lines of the additional USB port located on the small USB/CardReader board. This small board must be connected to the motherboard during the measurements.

ismailakyoltr wrote:PJP2 21.5 Ω (I disconnected the jumper, PU2 value is normal, low resistance is on the other side.)

Inject 3.3V from the laboratory power supply to the pad with low resistance of the jumper PJP2. Leave the thing connected for a while (~10 minutes) and then check if any component on the board gets warm. Pay special attention to the PCH part (small core) of the APU hybrid.

matic wrote:USB/CardReader board

USB 2.0 (2.pin 596 / 3.pin 596)

My processor is SR2EY(i5 6200U)
Yes, as you said, PCH is gone. If the only solution is to change. These models SR23Y(i5 5200U), SR342(i5 7200U), SR3LA(i5 8250U) are available in my scrapyard. Is there anyone compatible?

Yes, the APU needs to be replaced. Before soldering another one, remove the old one from the board and remeasure the resistance to ground on the jumper PJP2. If the resistance will increase to the high value (kΩ range), solder another APU.

ismailakyoltr wrote:These models SR23Y(i5 5200U), SR342(i5 7200U), SR3LA(i5 8250U) are available in my scrapyard. Is there anyone compatible?

It's impossible to know without the test, but I would try with SR23Y(i5 5200U) or SR342(i5 7200U).

Before powering up the board with a soldered replacement APU, transfer the BIOS ME-region from the donor board's BIOS chip to the BIOS on your board. First make sure the ME-region size on both boards are exactly the same.

matic wrote:Before powering up the board with a soldered replacement APU, transfer the BIOS ME-region from the donor board's BIOS chip to the BIOS on your board. First make sure the ME-region size on both boards are exactly the same.

Thank you for your interest. I can clean me with Fitc. I'll change it with the same logic, right? I hope I can do it, if not, if I find a paypal payment method, I will ask for your help. Now I have ordered the molds and we are waiting for them to arrive. Thanks again.