I stay at Hilton every week. They have nice 46" flat screens with hdmi input, and you can use the menu button on the to to change input. Speakers work just fine from the tv via hdmi.
The problem is, after 5 minutes the tv reverts back to the Hilton channel. Every 5 minutes while on hdmi input, it sucks! I I just watch Netflix on my phone now.
Pick up one of these:
Amazon.com: HDMI to Composite /S-Video Converter 3RCA CRT TV CVBS: Electronics
Or wait till I get mine to test it out first for quality.
My guess is what may be happening to you is the "unpowered" signal is probably so weak to that particular TV's input sensing circuitry it's reverting back to the Hotel's default channel cause it thinks nothing is plugged in after 6 min.
You will be able to view Netflix on most Hotels TV's too with the converter because it has S-Video or RCA's to TV's that don't have HMDI in.
Read the user reviews of the device on Amazon, "most" are happy with the pic quality through S-Video or RCA's.
I just ordered one for myself. I see them already rising in price probably due to demand as soon as the Droids got Neflix because I paid $47 with free shipping last week.
Tip: don't order from "Electronics Pro". They shipped it to me yesterday, but it now says "SHIPPING FROM HONG KONG" estimated delivery Aug 16th to Sept 1st".
* This is a bad business for this re-seller because they should have noted in description where it's shipping from like the others do.
My Brother who just got his came in 3 days from CA. I see another vedor shipping from NJ (and I live in NY).
I'm going to pay the extra few dollars, order another one from one of the other vendors and refuse delivery for the one shipping from HONG KONG. I always "hate" dealing with any of Amazon's re-sellers, but Amazon will credit me back if this seller does not refund my money quickly for the refused unit.