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No luck, no image on test screen, no usb activity. Is all hope lost? Student customer concerned about loss of data for university work so what percentage chance do you think 076-00236 hardware might pull data off? Ofcourse I would have to locate that hardware.

What? Take up to 100centigrade? or reflow temperature? For the cpu should I heat the heatsink itself to keep it even?

U3500 pin19 5.1v pin20 5.1v UB700 pin19 5.1v pin20 5.1v

U8280 is not mounted. U8286 is there, PP1V0_S0SW 1v with board powered ( but pretty sure read 0v before) Diode mode pin1 0.3 pin2 0.47 pin3 0.15 pin4 0.15 pin5 0.1v pin6 0.1v pin7 0.5v pin8 0v

PP3V3_SUS 3.3v PP3V3_S4 3.3v P3V3_S0 3.3v PP5V_S0 5.1v PP3V3_S4SW_SNS 0.1v PP1V8_S4 1.8v PP1V8_S3 1.8v PP1V8_S0 1.8v PP1V2_S3 1.2v PP1V0_SUSFUSE 0.99 PP1V0_SUSSW 0v and next time I look 5v PP1V0_S3 1v PP1V0_S0SW 0v PP5V_S4 0v and next time I look 5v PP1V0_SUS 0v and next time I look 1v...

I have no other A1706 board. I will check page 78. Yes Ive had the board alone on desk the whole time - just occasionally trying back in the case for benefit of fans but I suppose thats a bit optimistic!

Ive tried the BIOS above but still no usb activity, video or spinning of the fans via the keyboard ribbon cable in the case. Could it be lack of a clock signal or is that ruled out somehow? I have an oscilloscope

Client said simply stopped working. I haven't collected a BIOS for an 820-00923 A1706 as yet and can't find one on this forum. Is there anywhere else I can go?

No external video. CPU 55centigrade

PPVCC_S0_CPU 0.72v PPVCCSA_S0_CPU 0.78v PPVCCGT_S0_CPU 0v

I must have made a mistake in measuring originally as R1401 pin 1 is 3.0v, pin2 is 2.8v Diode mode to ground at pin 2 is 0.75v

No corrosion evident on board. pp3v3_g3h 3.4v ppbus_g3h 13.07v pp5v5_s5 5.12v pp3v3_s5 3.35v pm_slp_s4_l 3.3v smc_reset_l 3.4 all_sys_pwrgd 3.2v pp5v_s0_fan_conn 5.1v pp5v_s0_vcore1 5.1v pp5v_s0_vcore2 5.1v pm_slp_s5_l 3.3v rtc_reset_l 3.1v pch_srtcrst_l 3.1 pch_intruder 0v pm_slp_sus_l 3.3v...

I think customer would welcome disabled gpu if there are onboard graphics available. Would you have a pointer to disabling GPU?

There is an initial blink on the 2 snow edition drives in the USB ports at start of fanspin but no further flashing Fans do ramp up to full after a short while.

I used my CH341a programmer to write each of the two provided binaries to the Flash chip. APPLE A1286 MLB 820-2850-A OK resulted in no fan spin. PCT25VF032B_20160916_185643 still got fanspin but still no chime. Should I be expecting a chime to occur when board is devoid of all peripherals...

Resistance between pins 27/28 is now 20.6ohms and I have fanspin. Happy man.

Well I seem to have Q7080 and its current sensing working reliably now and pin 27 is at 14.3v

I took off all the feedback components U7000 and C7020/21/22 and R7021/22 and found one trace had 2.7kohm to ground. All reassembled, test tomorrow, need sleep. Thanks for your help.

Yes double checked the 0.3v on pin 27 I changed R7021/22 yesterday as 7021 looked ugly before (lumpy) so if they have gone wrong there is something else causing it.

Current situation is I get fanspin with LAB PSU only. On connection initially get green light but quickly changes to orange. ppbus_g3h has an 800mV ripple but does average 12.6v U7000 voltages when fanspin with Lab PSU. PIn voltage 1 0 2 15.8 3 3.8 9 0 12 3.4 13 3.4 14 3.4 15 0 17 12.5 19 5.5...