RB750GL loop in boot

Hi, I have a problema with my RB750GL, when I plug the power aparently is booting, but past 6 seconds aprox, all lan leds blink twice and then reboot, and this loop never ends…
Note: the ACT led is always on, this maybee will be important.

some idea how can fix it ??

I tried to use Netinstall to restore, but has useless…

form support say me this, and not work… have some any idea to restart my device??

Please check the article at:
https://help.mikrotik.com/docs/display/RKB/Reboot+loop
Please try to perform Netinstall:
https://help.mikrotik.com/docs/display/ROS/Netinstall
Power off the device, press the reset button, power on the device and keep the reset button pressed for 1-2 minutes.
While holding the reset button during Netinstall - please pay attention to how LEDs behave. Check if the device goes into the loop while the button is pressed.

please one by one, do not answer all at once

Netinstall is the only procedure that you can do to fix it.

If you can’t do netinstall, you can’t do anything for your device.

Regards.