Instrument failure on an S 60.

Moin,moin, this is my first visit to the Volvo-Talk, otherwise I am on the road in the BMW E39 Talk. In this case it is about the commuter car of my son-in-law. It is about a Volvo S60, first series, year March 2000, 2,4l, 170hp with a Prins gas system. Previous mileage 327,000 km. For about 2 weeks there are sporadic failures of the combination instrument, which attracts the failure of the instrument lighting, the climate control, all indicators, the seat heating. of the blower, the The rear window heating, the window lifter and the entire interior lighting result. The only lamp is the gear indicator of the automatic. What has been done so far: a repair attempt of the combi instrument by a renowned company that eliminates pixel errors. Apart from a bill of 59€ and the statement “irreparabel” no success. After visiting a free Volvo workshop with the statement ” 100% the combi instrument” was made a new repair attempt. This other company said un s, you have no simulation for this part because it is from the first series. In one test you soldered all the suspects known to you. Unfortunately, the success lasted only 2 days. Then I installed a used AI with exactly the same designations, again no success. Of course all fuses were checked (visibility and passage test). We are at the end with our Latin. The visit of a Volvo dealer is not possible for cost reasons! I hope now that the verbal The knowledge of this forum can show us a fingertip to heal the moose. Without heating it is already quite cold in the car. Sorry the length of the article. Greeting from the north Bernd.