Well that’s not a valid dump and in this way you have no valid backup file… again if the reading of the IC is not valid then it’s not going to be a valid programming.
Once the IC is erased or bad programming, without backups the user loses the system motherboard original data, like Win key, SN, PN, MAC etc…
Some ICs must be desoldered from the PCB to be programmed, some systems need CMOS battery OFF/ON and /or PSU standby ON/OFF…
Only a user with same system, that had done the same can be your helper in this matter…
The 5v “Bug” is almost gone from recent CH341A programmers… usally a bad reading is due to bad contact/short…assuming this is a SOP8 and not WSON8.
The GD25B256E(YIG) is indeed a 3.3v IC