820-01700 DFU error 4014

Djsp

Member
Hi, I have this 820-01700 board, which I replaced with a donor T2. When I power it, the board is in DFU mode. Soc_dfu_statu is 1.8V. I try to restore it with Apple Configurator, but it gives me this error: "Unexpected device state 'DFU' expected 'RestoreOS'" Error 4014.
I checked all the AWAKE and SLPS2R voltages, and they are all there.
PP1V2_AWAKE 1.2V

PP1V8_AWAKE 1.8V

PP3V3_AWAKE 3.3V

PPVDDCPU_AWAKE 0.755V

PPVDDCPUSRAM_AWAKE 0.802V

PP0V8_SLPS2R 0.800V

PP1V8_SLPS2R 1.8V

PP1V25_SLPS2R_SMC_AVREF 1.1v

PP1V1_SLPS2R 1.1v

However, I don't have any voltage on the SSD, PP0V9_SSD, PP2V5_NAND, or PP1V8_SSD. I don't know if this is normal. However, in diode mode, I'm measuring a slightly low value on PP2V5 and PP0V9, which then returns to a high value as it cools. I compared it with another card, and this isn't normal. What can I do?
 

2informaticos

Administrator
Staff member
Many times SSD voltages come back after DFU is completed successfully.

Lower readings in diode mode can appear if don't allow enough time to discharge remanent voltages.
Always wait 15-20s once power is removed, before checking in diode mode, or ohm scale.

Be sure to replace T2 with correct version (1G/2G), according with SSD size.
 

Djsp

Member
The version is the 1gb of ram supports the 500gb thing however goes on more than 20 seconds I did not encounter the same behaviour on another card I wanted to focus on ssd_pmu_reset L
 
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