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This usually happens if the contrast settings in the firmware don't match your LCD. You may need to edit the config.h file and recompile.
| What you need | Where to go | | :--- | :--- | | | github.com/kubi48/TransistorTester | | Compiled .HEX (Standard Mega328) | Check the bin/ folder in the repo above, or the "Releases" section of the m-firmware. | | LGT8F328P Firmware | Not available. You cannot update these clones. | lcr t7 firmware link
…then a firmware update may help.
I can provide the specific and firmware folder path once I know your hardware version. This usually happens if the contrast settings in
: If you have a Joy-IT branded unit, they provide direct downloads for manuals and datasheets . lcr t7 firmware link