here is the usb recovery file for
model BRANDT B3225HD LED
main TP.SIS231.P83
panel M320X13-E1-L(G4)
copy the file SISEU23X8M.bin on an empty usb stick
unplug the power cord
insert the usb stick and reconnect the power cord
look at the standby led, at the beginning it flashes slowly, after about 1 minute it doubles the speed, update completed
unplug the power cord and the usb stick
reconnect the power cord and turn on the tv: it will start in first installation mode
if it doesn't work with usb recovery, spiflash is damaged
replace it with a new one and program it using the file SISEU23X8M.bin
Thank you billobirillo for your prompt reply and the recovery bin file, I have tested to flash my TV and unfortunately no flash, no blink LED. So I suppose my TV SPI flash is damaged, so next step is to buy and change my chip.