Mini Display to HDMI adapter causing screen to go white/ gray

I recently purchased a mini display to hdmi adapter to hook my macbook pro up to my samsung led tv.
At first it worked great but after a few mins of inactivity both screens would go white or light gray and the macbook was totally unresponsive.
I pressed buttons, moved the mouse and nothing….I had to hard shut off and then restart the macbook to get the screens to come back up. I thought it might have been just a glitch but then it happened 2 more times all within the span of 2-3 hours. (keep in mind this is the first time ive ever used this adapter and have had no prior issues with my macbook)
I have no idea what could cause this type of issue.
Any suggestions or ideas on what could cause this? is it my settings or my computer?
I looked up the manual for my macbook online and my settings match what it says they should be… Im at a loss.
Any suggestions would be greatly appreciated. Thank you.

* my connection is macbook pro - mini display to hdmi adapter - hdmi to hdmi cord - Samsung LED tv.

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Mini display to hdmi adapter problem

Hi,
When I connected my mini display to hdmi adapter to hdmi, and hdmi cable to my ASUS PA238QR monitor, my early 2011 MBP 13" detects the monitor, but the monitor shows "hdmi no signal".
I tried unplugging everything, including the adapter and hdmi, but to no avail. I tried putting my computer to sleep, and waking it up, still, nothing seemed to be the cause of the problem.
I read through some old discussion on this issue, and nobody seems to have a solid solution besides purchasing another adapter.
I tried booting into win7 and still, the monitor shows "hdmi no signal".
I am 100% sure my monitor and hdmi works becuase when I used other laptops it's fine.
Thus, I'm suspecting it's the mini display to hdmi adapter's problem.
Is there a way I can make sure that my macbook pro is outputting the signal?
Any recommendation or advises are welcomed. Thanks for reading.

If you've an HDMI port on your television, you could always try that.
I've used this adapter from Monoprice successfully - not bad for under $7.
Give your TV a try - if no go, then you'll know that it's an adapter problem.
Good luck,
Clinton

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I always recommend monopriice.com for cables and adapters.
Mini DisplayPort | Thunderbolt® to HDMI® Adapter w/ Audio Support
But all these adapters are in the form of "pigtails" and no matter where you get them the strain relief and the cables can fatigue and break from constant bending or pulling (doesn't help your macbook socket any either).
Maybe you should order a bunch. They are cheaper that way at monoprice.
Another possibility might be you trying a mini displayport to HDMI cable. No adapter.
Kanex Mini DisplayPort to HDMI Cable with Audio Support (10 ft.)
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First time use with a Hitachi TV was disconcerting. Used to the old VGA setup, plugged everything in (while the rest of the family was watching regular TV on the unit), fully expecting the Mac to recognize the external display and send the signal over. No go. Tried resetting the PRAM, rebooting the Mac, no joy. Was about ready to write the cable off as a bad POS, when in a flash of inspiration switched the TV's input over to its HDMI port. Lo and behold, the Mac switched res and started sending sight and sound over at the TV's native capabilities. Did not need to fiddle with any adjustments at all. Sound was great, display crystalline clear. Wowed the folks.
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You are going to have to wait until Apple fix this as some 3rd party monitors are not supported by this update.
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or
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This is an SOS message. I have purchased another Mini DisplayPort to HDMI Adapter and I have iMac (27-inc, Late 2009) running OS X Yosemite (Version 10.10.1). I have carried out the connection of Mini DisplayPort to HDMI adapter to LG Plasma TV Screen, but there is no sign of any of the equipment reading or aware of the connection. Is there anybody out there who can help me make it work? Also, why is that Yosemite - System Preference, click on Displays does not contain - Arrangement? I'll greatly appreciate any useful tips from the community or apple support team.

Eric has helped in providing in dept understanding around the subject matter, but unfortunately, it has not provided the solution to the problem.
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My *iMac is -
iMac (27-inch, Late 2009)
iMac10,1
(10.10.1)
MB952XX/A
Running OS X Yosemite
When the above image is compared with the following image below, there is definitely something missing and it’s probably affecting the Mini DisplayPort to HDMI Adapter to work in my connection.
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How can I make my iMac 10,1 (27-in, late 2009, currently running OS X Yosemite 10.10.1) to have the above AirPlay mirroring or Arrangement to activate the connection?
Are there other ways I can make the connection to work?
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edgravel
Re: iTunes Store Won't Load, Won't Show Error Message
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Mini Displayport to HDMI Adapter Problems!!!

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Mini Display to HDMI adapter causing screen to go white/ gray

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