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Hi, my name is Marty.
The only thing this could possibly be is a faulty bulb or socket or a fault with the instrument cluster circuit board. I would be concerned that they did not replace the correct bulb. I normally replace all of the bulbs for the instrument illumination when doing this repair. If they are 100% sure that they replaced the correct bulb you will need to have the cluster sent out for repairs. I honestly suspect that they did not replace the correct bulb. I've attached a document showing the placement of the bulbs in the cluster.
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