Hacking Question SXOS Mariko Green Light Blackscreen

[azureskydreamer]

Help! If anyone can give me comments or ideas it would be great. Thank you so much.

Long story short,

• Been using it for 5 months SXCORE and SXOS working well 10.1.0 and SX 3.0.4beta
• Only have SysNand
• Updated OFW to 10.2.0
• Updated SXOS to 3.0.5 beta
• all functioning well and suddenly one day SXOS Error Code, require reboot
• i rebooted and it unable to go into SXCORE bootloader
• Long BlueLight Blinking then it will show Green (but seems like blue light is on as well with green)
• tried formating MicroSD Card tested both formats ExFAT (originally) and FAT32, also changed New MicroSDcard to test..
• Still same black screen, green light.
• Open up to check the soldering, all is fine and connected well.
• I unplugged the core and plug back the Nand to original place without removing my soldered ribbon onto the processor
• Switch Boots into OFW with no issue.
• Any ideas what is broken?
• could it be 3.0.5 Beta is the culprit, and broke the core?

Any ideas are much appreciated. Thank you.

 

[x3n0]

You can try to flash the chip like this thread suggests

 

[azureskydreamer]

Thank you so much for the comment and help.
Unfortunately, the person who soldered it for me did not include the debug port so i cant test this solution.
However, i trying to get a new one, i shall try this method when i get a debug port part.

 

[azureskydreamer]

If anyone have been searching, i bought a new core and changed the core board.. then it works again.. didnt resolder