Motors won't start when both Battery connected and BFC connected

[riumiybe]

I have a Nazgul5 with a FrSky XM Plus receiver, binding it with a TX16S.
All equipment was successfully working and I was able to hover, though after landing everything seems to be disconnected all of a sudden.
I checked if my TX16S is successfully binding with the Nazgul, and according to Beta Flight Configurator, my sticks are responding.
Though when I connect the quad with a battery, nothing responds to my TX16S.
Also, I also tried rotating the motors in Beta Flight, but they didn't rotate.
No image is coming into my goggles as well....

Why is this happening?? Any solutions I could try??

 

[droneguy]

Analog video or DJI?

 

[riumiybe]

Thank you for your reply! Its Analog.
I commanded STATUS and this came up.

#
# Building AutoComplete Cache ... Done!
#
# STATUS
MCU F40X Clock=168MHz (PLLP-HSE), Vref=3.28V, Core temp=43degC
Stack size: 2048, Stack address: 0x1000fff0
Config size: 3960, Max available config: 16384
Gyros detected: gyro 1
GYRO=MPU6000, ACC=MPU6000
OSD: MAX7456
System Uptime: 136 seconds, Current Time: 2021-03-09T15:20:03.328+00:00
CPU:6%, cycle time: 125, GYRO rate: 8000, RX rate: 110, System rate: 9
Voltage: 29 * 0.01V (0S battery - NOT PRESENT)
I2C Errors: 0
SD card: Not configured
Arming disable flags: RXLOSS BADRX CLI MSP ARMSWITCH

 

[droneguy]

A quick fact check here will help....
Current situation is

1. When connected to BF no battery, radio/receiver works?
2. When not connected to BF, but connected to battery, then no joy (meaning, no radio arm/beeper etc. and no video in the goggles)?

 

[riumiybe]

Yes, both 1 ,2 are correct!

 

[droneguy]

So this would indicate a issue with power. On many FCs, when connected via USB, the USB voltage powers the 3.3v and in some cases some of the 5V pads. which is probably why your receiver is working in betaflight. When powered off the battery, the power comes through the ESC via a voltage regulator through the cabling between the FC and ESC. You either have a blown regulator on your ESC board, which you can test with a multimeter or a wiring issue between your ESC and FC.

Can you provide more information on what ESC and FC you are using?

 

[riumiybe]

I suppose this is the FC and ESC right??

 

[droneguy]

Did you build it or is it a BNF?

 

[riumiybe]

So does it mean that the receiver is working correctly and binding with my radio??
And there is something wrong with the FC or ESC?

 

[riumiybe]

It is a BNF I got from Get FPV!

 

[droneguy]

If it's brand new, I'd contact GetFPV. In order to proceed you will need to check voltages to see if the voltage regulator got damaged somehow. Do you have a multimeter and know how to use it? Not meant to sound derogatory, I just don't know your level of skills around electronics.

 

[riumiybe]

Its been a while since I bought it and I've used it outside to hover once. It worked correctly at that time.
I don't have a multimeter unfortunetly.
I'll consider buying one. Do you have any tutorials to reccomend me when I get one??

 

[droneguy]

You are kind of at a roadblock without a multimeter. You can get one on Amazon for a price of $15-$60. Avoid the $10-$15 dollar ones as they typically have higher failure rates. Something like the following would work well but get whatever you can afford. Klein is a good brand that is very affordable.

https://www.amazon.com/Multimeter-Auto-Ranging-Klein-Tools-MM400/dp/B018EXZO8M/ref=sr_1_1?dchild=1&keywords=klein+multimeter&qid=1615309045&sr=8-1

 

[riumiybe]

Thanks for the link! I'll try to get one soon.
So should I get a new pair of ESC and FC just in case they are broken as you said??

 

[droneguy]

Thanks for the link! I'll try to get one soon.
So should I get a new pair of ESC and FC just in case they are broken as you said??

That would be premature I think. From what you described, a test hover shouldn't have led to component failure.... unless there is more to the story.

 

[riumiybe]

Nothing to add, but I noticed the ground was very sandy and full of small rocks. Maybe the quad had scooped up some rocks and damaged something... although I can really see any damage from the eyes