NAND Chip Mask ROM Mode Short Location

[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]

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

[phankhanh86]

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

last try again!

[JoseM]

last try again!

no device found

[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!

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

[ath156]

JoseM
You didn't say what cable you use (type and 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]

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.

[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.

[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

[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

[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

[JoseM]

Hotrod1 ath156 phankhanh86 tv-box unbricked thanks for your help

[Hotrod1]

Hotrod1 ath156 phankhanh86 tv-box unbricked thanks for your help

Well, what did you do that made the difference?