garmin 530 that keeps restarting without working, is there a solution!

I did as you told me now the screen is white it froze

I'm sorry it didn't work. What I gave you are Garmin's instructions - you may have a hardware defect.

Garmin's suggestion for a locked unit:

Edge Device Is Locked up and Not Responding | Garmin Customer Support

I don't know where you are, so search for Garmin Support and contact them.

It's okay, thank you 

1. Turn device off
2. Hold Lap/Reset and Start/Stop
3. Press and release the power button
4. Continue to hold only Lap/Reset and Start/Stop
5. Release Lap/Reset and Start/Stop when the Garmin Logo is cleared
6. The unit will restart and clear non-vol

Thank you, but I did not understand the name of the buttons, where they are located 

Lap/Reset is bottom-left

Start/Stop is bottom-right

https://media.dcrainmaker.com/images/2019/04/Garmin-Edge530-Front-Buttons.jpg

Thank you my dear friend, I will try as you told me

Is there a video so I did not succeed in applying what you told me I did not understand

I can't find a video.

With the unit turned off - Press and hold the two buttons on the bottom - do not let them up.

While holding the buttons, press and release only the power button. When you see the Garmin logo come and go, only then do you let go of the bottom buttons. Then it should restart on its own.