My fluorescent lamp was flickering time to time until stopped working at all. I guessed was the supply of 220Vac and since it is not vacuum closed, I decided to fix it, even though it is not worth doing it price-wise.
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Step 1: Open the Fluorescent Lamp
Globe is plastic and I had to be cautious not to break the lamp, which contains mercury among others (dangerous for health).
Measuring the base of the lamp with the board for continuity, it was showing that only the central of the base was attached, while the neutral not. (I used multimeter).
I desoldered from the board the wire that was still attached to the base where the 220Vac was supplied.
Step 2: Repairing the Lamp
I made a hole on the side of the base (as sown in the picture), so the wire can fit through, I soldered and then reconnected the new cable at the base as well at the board.