need help in an aml8726-mxs tablet

hello community first of all im sorry if the post in the wrong section
secondly i have a tablet that when i turn on stuck at the first logo

which is "dual core aml-mx amllogic" this is what written on the logo

i don't know what is the problem i think that it needs a firmware

first problem i don't know how to backup this kind CPU firmware in case i find a working tablet same as mine to flash the working firmware to

i know how to do so for other brands like allwinner or rockychip but for this aml i don't know how

second problem i don't know how to flash a firmware to this CPU does it accept sd card flash firmware or usb and pc flash and how

plz anyone who know how to deal with this type of cpu or tablet help me

here is the tablest specification

borad : aml8726-mxs_mxl-mid-ref-86v_h-a-v1r1

touch flat : -8-6221 jyt

lcd flat : fpc7005013-a

camera flat :msd1115-qh86v-v13.0 blx.n

tablet only have power button and reset button "no volume up or down"

anything else needed plz reply to me with what other information needed

thanks you in advance and plz help me

ps : i recently downloaded a firmware from internet and tried to flash it with aml burning tool but the device seems to be disconnecting while flashing so the tablet now identified by the program but nothing appear on screen when trying to turn it on