Hi

This laptop came with everything working perfectly but with no sound and audio device isn't detected in the device manager even if it is enabled in the bios, AMD High Definition Audio only available..

inspecting the stupid j4701 and 2 broken pins found, pin 3 (+5V_USB) & pin 2 (A_Z_SDOUT), pin 3 isn't critical as 2 other pins are delivering that line, pin 2 repaired using a thin wire to connect to pin 2 on j4801... still not detected

I've checked for continuity on all the 50 lines connecting both boards and all are fine..

Replaced the chip (CX20752-21z) with 100% working one, still not detected..

BIOS flashed, still not detected !

All voltages are there:

+5V_USB
+5VS
+3VS
+1.5VS
+3VSUS
+5VSUS*

*Strange thing is that voltages aren't there while the laptop is turned off (no standby) except +5VSUS line, is that normal ??

Another strange thing is the resistance to ground at CX20752-21z's pin 5 (A_Z_BITCLK) it is 1.7 ohms, traced till R0720 and it's 33.5 ohms on the CPU side, is it a normal resistance on pin 5 ?

this one drove me craze, where to dig now ??

Device manager have a sound card?

No..

I've started from the strange low resistance of CX20752-21z's pin 5... tested a couple of similar chips on other boards to find out the resistance is much much higher !

I've removed the HDD mini-board and the short was gone at R0720 on the mainboard, inspection of the (goddamn j4801) and found a short between pin 22(A_Z_BITCLK) & 24(GND) !

Now 2 broken pins in j4701 and 2 shorted in j4801..

I've removed the stupid connectors and now I'm searching for similar ones, there's no way to order online for me...

any ideas where to dig for them ?

Connectors repaired, audio started working perfectly..

Thank you