Vanishing miles

[hugger6933]

I went to my salvage sale on wed. and found a 99 s-10 blazer. The blazer caught my eye because it wasn't hurt that bad [tailgate back glass and two taillamps] and my wife used to like them and then I could put her 05 silverado up for sale. The Blazer had 87182 miles when I looked at it in the preview before the sale started. I bought it and when I went to drive it home the miles did not display. I was and am sure that the miles were lit before and when I got home I looked at the pics of the units in the sale and they always show the miles if they light and this one did. My thought is some scumbag did something to this blazer so someone else might not see the kinda low miles. Can anyone give me a direction to look for the problem? I quickly looked at the fuses did'nt see one missing . I did'nt check the fuses with a test light thats next. Anyone? I have owned hundreds of s-10's and never had this. Any help is apprecaited. Jim