Devo 8s over voltage input cannot power on

I am input 11.1v. Lipo battery and switch on lcd power on display show 1-2 sec display lcd off. After cannot use. Hlep me please.

Given it only takes 6v i reckon you have fried something. Could be you are not the first, do a search. Or open tx and you will probably see where the smoke came out.

www.deviationtx.com/forum/6-general-disc...-in-trasmitter#10485

There are 2 8s in my household, I can possibly help you identify components.

www.deviationtx.com/forum/3-feedback-que...a-resistor-burn#9665

Even with only a 2s lipo you must use diode to drop voltage.

I have 2s lipo with diode in my 8s and it works fine like this.

No have burn in circuit. But VDD. Output 2.08v. Only

Ok, may or may not be visible to naked eye, but I still reckon you have fried something.

Sounds like you have a DMM, problem "might" be easy to find. Check reg and other associated components in supply.

Reg input and output would be a start.

Have capacitor near L04A 1 unit. Multimeter check but no have capacity.

Will look at my tx.

www.deviationtx.com/forum/search?query=d...te=all&childforums=1

Part of 8s power circuit can be found in above link.

I think you are looking in the wrong place. I cannot see 3v3 reg, maybe it is on other side.

Out of curiosity, what is blue wire on STM32?

This no have in and output no have voltage.

This ok.

The RT9167A (LO4A) is a LDO reg but I would expect the 3v3 reg to look more that pictured below with yellow spot.

LM78D06 have 6v. output When insert charger cable. RT9167A have 6v. input when insert battery and have output 2.08v. only.

Ok, maybe LM78D06 is for charging, it's been a while and I need to familiarise myself again.

My tx has 6v in (red circle) and 3v3 out (yellow circle) of RT9167A,

Absolute maximum input rating for RT9167A is 8V

edit:
So if input is batt voltage it could be damaged. A schematic would make things much easier. The RT9167A-33CB are on Ebay
33 is 3V3 output voltage and CB will be package/pinout.
It appears you have enough knowledge to fix this. Keep us updated, it will help others.

Thank you very very much.

This capacitor you can check have how much capacity? I am check this capacitor check no have capacity.

This is problem VDD =2.08v. yes or no?