407 1.6 hdi Indicator light

2006 407 Hdi On the Km dashboard of my vehicle, the Km numbers sometimes seem too faint to read. Sometimes it gets better and looks very clear. When I opened the subject to the electric master of the service I went to constantly, he said that it was not repaired and that the instrument panel should be completely replaced. Since I didn't think much, I felt the need to present it here. In this period, I think there is no malfunction that cannot be repaired.

I would appreciate if friends who live or know the same topic help.

NOTE: I am in Ankara.

1- Type with bulb. bulbs change in this problem ends

2- an electronic staple. it is repaired. i heard that there are somebody repairing in konya

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The problem only occurs in hot weather. When I keep the car in the closed garage and start it in the morning, the problem is solved, but the indicator numbers disappear when the car is in the sun and gets hot.