DTP70 LED is solid red

• An error occurred while the instrument was scanning a target. Use the third-party software application to clear the error. You can then retry measuring the target

• Remove power from the instrument, reapply power and see if the condition is corrected

• Reading optics are dirty

• Reset the instrument

• This could indicate that the unit may not be programmed properly, which could happen if power was removed during reprogramming. Try reprogramming the instrument again (refer to the programming instructions that came with your update).