Dash cuts out after start up. need help

[bluestroke06]

2006 f250 4x4 6.0, 74xxx miles. auto

So I noticed the past few times I have taken the truck to work, after its been running about 5min, the entire dash: gauges, dash lights, radio, hvac illumination will cut out momentarily then come back on. only does this once per drive cycle that I have noticed. All gauges will drop as if i turned the truck off, and the radio will go out, both display and sound. Almost as if I am loosing communication to them. Or power for that matter, Has anyone experienced this before? Doesn't happen every time I start the truck, but more often than not.

[Purecetane22]

Sounds like bad alternator. Have you been getting a battery voltage light?

[bluestroke06]

no battery light, scan gauge reads between 13.8-14.2v at all times