First, check that the programmer is properly connected to make sure that all connections are strong and inserted correctly.
Secondly, ensure the chip compatibility and match of the programmer and the target device, which may fail to check the blank because the chip specifications do not match. Also, take care to check that the programmer software is up to date and installed correctly on your computer.
Finally, check whether the chip of the target device is damaged or damaged. It is possible that the problem of the chip itself will cause the blank check to fail. In summary, a blank check failure may be caused by a connection error, chip incompatibility, software problems, or chip corruption.
I also had this problem when I just bought flash memory a few days ago, and replaced it with CH341A programmer version 1.17