NAND Chip Mask ROM Mode Short Location

[Hotrod1]

OK here is the correct 2 pins to short (in the red circle) !!!
https://ibb.co/2g15gQK

Don't give up yet. When I first started doing this I must have bricked my box 6 or 7 times before I settled on a custom ROM I liked. I told you about the guy in the video to give you a bit of hope that it's possibly not dead. I wouldn't cut my losses until I was 100% sure I was short the correct pins. I've had ROMs not load at all erroring as soon as I started the flash or get to the 80% mark and error and even complete successfully that all bricked it. But brought it back to life every time.

Edit: ath156 sorry my comment was meant for JoseM

[ath156]

now it's too late i guess i damaged the flash chip i also remember when tv-box was working i coudn't erase the flash in maskrom mode this happened after erasing and flashing a few custom ROMs which were working fine till the last ROM which bricked the tv-box when i turn on tv-box there is no hdmi signal only blue light

OK here is the correct 2 pins to short (in the red circle) !!!

https://ibb.co/2g15gQK

[JoseM]

I saw a guy take a screwdriver and start touching pins until he found the right ones and his box connected in a video. I would never do something like that nor recommend doing it. I just mention it because it would seem either he was extremely lucky or it's not as hard to destroy the chip as one might think. Probably a bit of both.

now it's too late i guess i damaged the flash chip i also remember when tv-box was working i coudn't erase the flash in maskrom mode this happened after erasing and flashing a few custom ROMs which were working fine till the last ROM which bricked the tv-box when i turn on tv-box there is no hdmi signal only blue light

[Hotrod1]

is it possible that i damaged flash chip by touching other things here and that's why your solution don't work ?

I saw a guy take a screwdriver and start touching pins until he found the right ones and his box connected in a video. I would never do something like that nor recommend doing it. I just mention it because it would seem either he was extremely lucky or it's not as hard to destroy the chip as one might think. Probably a bit of both.

[ath156]

Male to Male USB 2.0 (Type A to A) 1m and Male Type A to Micro USB Type C 1m

To take out of the "equation" problems because of the cable either shorten the cable to less than 30cm or even better make a new one DIY. Most of us have spare/useless cables around (from old smartphones etc). Cut the USB-A male part of 2 such cables and connect the 4 inner wires color to color. A DIY cable better do it less than 15cm in length.

[JoseM]

JoseM
You didn't say what cable you use (type and length).

Male to Male USB 2.0 (Type A to A) 1m and Male Type A to Micro USB Type C 1m

[ath156]

JoseM
You didn't say what cable you use (type and length).

[JoseM]

last try again!

is it possible that i damaged flash chip by touching other things here and that's why your solution don't work ?

[sasafat]

Hi guys, I'm so happy to have found such a thread, my device is also bricked. I wanted to ask myself because I couldn't find a photo or short circuit information of my device. I would be very grateful if knowledgeable folks could help with this.


R-box 4K - RK3229 Thank you all.

SOLVED
I found it myself I'm ,sharing it to help other people. Connect the otg cable while short-circuiting and pressing the power and reset keys.

[JoseM]

last try again!

no device found

[phankhanh86]

ok could please tell me which exactly two short points should i connect

last try again!

[JoseM]

JoseM
Use a short USB-A male to USB-A male Cable. Not type C. Also try different USB ports of your laptop (not all of them provide the same power !!!). Also if you are using a PC, better try USB ports at the back (beside the motherboard).

ok could please tell me which exactly two short points should i connect

[ath156]

JoseM
Use a short USB-A male to USB-A male Cable. Not type C. Also try different USB ports of your laptop (not all of them provide the same power !!!). Also if you are using a PC, better try USB ports at the back (beside the motherboard).

[JoseM]

are you sure step by step?
short two yellow point one by one
connect usb 2.0 to pc and plug power

maybe i'm doing something wrong could please show me exactly which two yellow points

do i need to use USB Cable Male to Male ? or USB Male to Type C just like i'm flashing normally firmware ?

[ath156]

thanks for help but still no device found

btw my tv-box shows blue light (not red) not booting no video (no hdmi signal detected)

I hope you did not do any "hot-plugging" with the HDMI cable and so you burnt the HDMI port !!
If you have an AV port try to connect it through it with a suitable cable.
Otherwise keep trying pairs of possible pins that will initialize NAND.