My VU+ Duo was with the redlight on on the display, the buck AOZ1021AI number 3 on the above picture was burned.
So, I could order AOZ1021Ai (I still have 4 left), I replaced the buck number 3 with the new one and replaced the C807 220µF 16V capacitor with a 330µF 24V capacitor (see pict 1).
Power on the VU+ DUO, the display stays looping on "starting", fan not working, still red light : bad news.
Power on + USB key for the loading the duo_cfe_3_0_usb official bootloader for big image from VU+ Duo, display reading usb and finished : good news, I could load the bootloader but still red light on and no fan working
Power on + USB key with blackhole image, the display is looping on "reading USB" : bad news
Power on + USB key with official image V07 for VU+ : the display is looping on "reading USB" : bad news
Tried to load new image nfi official VU+ thru COM port, crossed RS232 cable and vu+ util : vu+ util could connect thru the COM port but not thru the ip connection : bad news, could not flash new image
I did not try yet the putty solution (see posts above in the forum)
So I bought a new VU+ Duo for 300€ delivery included and hope it will not stuck within the next 2 years. I am still convinced it' a good box for the price we pay for.
For people who wants to buy spares , here is a link (french official partner VU+ DUO) where you can find all spares (included the motherboard of the VU+ DUO), but the price for a new motherboard is expensive
Code:
http://www.e-dreamshop.com
If you add 50€, you have a new one.
I did some improvments in the VU+ Duo because it is starting now, but without the ability to flash an image, it does not help.
Hope this can help somebody