My Pansat 2500a puff is still stuck on F.

i try loading ukr_puff1.0.1_convertbox.bin when it work after trying about 10 time. i loaded ver 103 afterward and it stuck back on F again. now i can't get ukr_puff1.0.1_convertbox.bin to work again. so i try using ukr_puff_conversionflashfix.bi n 4 times before it work and re-boot. however, when it re-boot it didn't come back on. after waiting 5 min or so i unplug it from the wall and plug it back in and it booted up and stuck back on F.

Please help and if it work again do i need to install ver 103 back on it or just install the working bin.

thank in advance