GT2560 Only work with USB plugged in

[FrancYescO]

i recently bought a i3 Pro W but from the first run the LCD does not turn on, only the fans start spinning and a green led turn on on the board, the only way to get it working (and to get the printer working) is to connect the USB power (to a PC or a simply USB charger)

here a video of the issue: https://www.youtube.com/watch?v=___bmnzfczk

someone have a tip for fix the issue (i assume is something broken on the motherboard) and get the printer working standalone?

[William]

You should use multimeter test the voltage of mainboard in here:

[FrancYescO]

[quote=William post_id=81340 time=1509961423 user_id=51382]
You should use multimeter test the voltage of mainboard in here:
[/quote]
Just tested, witouth USB power supply voltage here is just 1.65v

where is the issue?

[William]

It seems not enough power supply for the mainboard.You should test the voltage in power supply(normal is 12V) :

[FrancYescO]

[quote=William post_id=81346 time=1510019336 user_id=51382]
It seems not enough power supply for the mainboard.You should test the voltage in power supply(normal is 12V) :
[/quote]
Voltage on both connector is 12.20v i assume is okay

[William]

It seems you need a new mainboard, contact related after-sale for help.