(return code: 20, CMD Error: Invalid response)

[parth]

Insertion test... Done.
Init bus...
VCC: 3.3 V, VCCQ: 1.8 V
Failed to initialize eMMC (return code: 20, CMD Error: Invalid response) !!!
CMD1 error, cmd response: 0x0, card state: 255 (Card is in unknown state)
SEND_OP_COND command failed.
--- Check eMMC pins and connection ---
--- Try to select correct VCC/VCCQ manually ---
--- Try to decrease the clock speed ---

How to solve please guide me

 

[waqas_ali6012003]

if you are using ISP pinouts then check auto volte and also click on direct emmc also ...

if stil same you suld remove emmc and try with it

 

[adrian721]

for isp connection,

1. try to disconnect pin vcc n vccq
2. CHECKLIST direct emmc
3. connecting usb to phone n try again to IDENTIFY

 

[TimTam19]

same problem on oppo f9 CPH1923.

 

[Mobin]

recheck all connection and try again mostly check cmd

 

[mifta]

Failed to initialize eMMC (return code: 17, CMD Error: Invalid response) !!!
CMD1 error, cmd response: 0x0, card state: 255 (Card is in unknown state)
SEND_OP_COND command failed.
--- Check eMMC pins and connection ---
--- Try to select correct VCC/VCCQ manually ---
--- Try to decrease the clock speed ---

 

[KarimAfghan]

Failed to initialize eMMC (return code: 20, CMD Error: Invalid response) !!!
CMD1 error, cmd response: 0x0, card state: 255 (Card is in unknown state)
SEND_OP_COND command failed.
--- Check eMMC pins and connection ---
--- Try to select correct VCC/VCCQ manually ---
--- Try to decrease the clock speed --

I have the same problem, I haven't used ISP for a year
If there is a way to solve this problem, please advise