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ik6gzm it's probably a problem with the printed circut. I've received one defective. Check the display segments contacts with a multimeter, they are all paralleled, so probably you can find a false contact caused by a troughole defective. multiply it or them to the others with a short piece of insulated wire and check it again. Good luck

Alexandros Tsiolis 07/06/2017
Segments not lighting up properly even after reset. Checked all the soldering the seating of the chips and the orientation of the displays. Throwaway...
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ik6gzm could you explain how do you did? maybe with a picture or a short video? many thanks, I have the same problem too....

tortion 19/05/2017
I bought a total of 12, of which only 4 work normally. All the remaining 8 LEDs normally turn on. However, time setting is not possible and temperature display is also disabled. DATE, DISP, and other menu changes. I do not know what the problem is. The soldering was done exactly at 330.
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