Bootloop after misconfiguration ControlX

[Soneoy]

Recently I've flashed linux dual boot on my CX CAS rev K, it works perfect, but after a while I set the wrong partition as default boot partition, the calculator went into a bootloop with a black&white loading screen, it goes to around 50% and restart foever.

OS installed: 3.6.0.550
Boot1: 3.00.99
Boot2: after nboot loaded it reports 255.25x.xx.x (forgot exact number but I think it's dummy)

Tried started with key combos:
doc+enter+ee, noting happen
doc+enter+ - , stopped loading anything and a floppydisk icon (?) pops up
doc+enter+2 , stopped loading anything with a gear icon pops up
esc+menu+ -, nothing happen

I believe it tried to boot into partition without any system
Should I buy a USB-TTL and try to flash boot2 partition?

[critor]

Hello.

Does the ControlX boot combo still work ? It's reset+

ctrl

.

For information, the

doc

enter

-

boot combo does immediately wipe out the diags partition content.

[Soneoy]

Hello.

Does the ControlX boot combo still work ? It's reset+

ctrl

.

For information, the

doc

enter

-

boot combo does immediately wipe out the diags partition content.

Thanks for reply, ConrtolX boot combo not working in my case.

Since I already wipe out diags partition, should I just try with ttl?

[critor]

If ControlX was in the diags partition, indeed.

You should try reflashing something bootable in the Boot2 or Diags partition with ttl, yes.

[Soneoy]

If ControlX was in the diags partition, indeed.

You should try reflashing something bootable in the Boot2 or Diags partition with ttl, yes.

What kind of ttl to usb should I buy? 3.3v/5v?

Should I solder tx/rx or just try to clip on it?

[critor]

3.3v must be available.

I usually try to clip the wires.