Gauge/Horn issue. 07 Accent - Hyundaitech please help!

Have an 07 Accent 3dr. Was driving down the road at approx 80kph. Beeped the horn in a few (4-6) short blasts and the Parking Brake light came on and all gauges (gas, speed, temp, revs) reset to zero and
quickly returned to the position they should be in. I've been able to do this a few more times and I'm sure I could again. Any ideas? Everything works fine as this happens, no change in power, speed, revs, etc etc.
Please Help!
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Sounds like a poor ground or power issue that is aggravated when you honk the horn. All the stuff you list would normally occur when initially turn the key to the on position-- it's the check procedure that occurs on power-up. Time for a visit to your friendly neighborhood dealer.
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Help provided - it's under warranty... take it to the dealer.
--

-Mike-
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