Mitsubishi LT-46151 46 in. HDTV LCD TV Logo

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Question about Mitsubishi LT-46151 46 in. HDTV LCD TV

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My Roku stopped working on my Mitsubishi LT-46151. I switched HDMI ports, but still got nothing. None of the 4 ports will work. Does it sound like a list cause? The Roku works on other TVs, so it it the problem.

Posted by Diana Garcia on

  • The Spaminator
    The Spaminator Mar 31, 2021

    Hi Diana Garcia, try this !
    ?remove the power cord is usually left plug from the roku for 20 seconds and plug back in.
    ?Wait about 30 seconds and see if roku is powering back up and displaying on hdmi source.



1 Answer

David Peacock

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Your television hdmi ports are no longer working. You could try to solder new ports onto the board, or you could take it to a specialist in television repair.

Posted on Apr 17, 2021


5 Related Answers


  • 3130 Answers

SOURCE: Dead Mitsubishi VS-5006R.

The most common problem with this set in the start up circuit of the power supply. There is a resistor, a 270k, R903, and even if it checks or looks good replace C920. Also there are small resistors off the flyback transformer that will open up because of bad capacitors feeding those circuits. Also any capacitor that has a swollen top or body, replace. Double check and make sure the B+ fuse is not blown. If it is, before you replace it, check to see if the horizontal output transistor is shorted. If it is, replace the transistor, BUT intall a 100 watt light bulb across the blown fuse. If , when you turn on the TV set, the light bulb glows bright, one of the deflection yolks is probably shorted. Unplug the set, and pull out one of the yolk plugs. tun back on the set. If the light now glows dim you have the bad yolk. If it does not and is atill bright, unplug the set, replug in the yolk, and take another yolk plug out. Do in this order and replug back in the tested yolk and make sure you unplug the set each time you do this or you will cause more problems. goos Luck. Please do not forget to rate this thread.

Posted on Dec 11, 2006



  • 4402 Answers

SOURCE: mitsubishi hd1080 ws65809

There is a resistor by the high voltage transformer,it has low value and it opens for no reason,he is likely open and does not let the set stay on,if you are familiar with tv service you can replace it and while you are down there check for any over heated areas and resolder them specially the convergence IC.This resistor is located in the back edge of the chassis in the board in the right side and it might be hidden by a plastic casing that covers the high voltage transformer.If you are not too familiar with tv service you should seek the help of a servicer.Let Us know how it goes or if you need more information.

Posted on Jan 10, 2008


  • 208 Answers

SOURCE: HDTV connection on TV is not HDMI

The port is called a DVI input. You can find a HDMI to DVI adapter at Circuit City, Best Buy, Ultimate etc..........

Posted on Feb 10, 2008

Chi Chu

  • 8457 Answers

SOURCE: I have a Mitsubishi DLP (WD-73833) and I am

Sound like ur main video board have alot prob.,must change,HDMI ports not that easy damage if used it correctly.

Posted on Nov 17, 2009


  • 1 Answer

SOURCE: Can't get sound out of the LT-46151 - mute is not

turned on tv no sound this morning and nothing mute not on worked last night

Posted on Apr 23, 2011

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lost the free manual? it has simple instructions.

no RoKU stated model, saying just Roku means nothing, oK>
it has a real name and model, just like you unstated TV.
lots of Roku)
I have the Ultra (non Dongle) not the STICK.
mine is (best) a floating box. with 1 AC power pack (see?)
and is not optional.
first is power, the Ruku must have power.
then on mine power light on the roku glows
next is internet
and last is hdmi connected to TV.

Power, then internet and hdmi.
finally is TV set to TV's hdmi port number that is ROKU.!
if our ROKU is only a streaming stick (DONGLE)
it steals power from the TV HDMI port.

mine is ethernet connected for max performance

my guess is you have the TVs input selector set wrong
wide guess blind to true MODEL I am, non stated
good luck
and nothing beats a ROKU,
for 1 reason the player apps in it all work and are updated for free.
That is why TVs no come with ROKU inside for that 1 reason.
I use ROKU plex and to my own private servers.

Just hooked up the streaming stick to HDMI to the TV. nothing is showing up, What do I do now?

Sounds like you have a bad connection on either your roku stick or your HDMI PORT.Does you ROKU stick show a white light if not check power cable or electrical plug.
Try wiggling ROKU stick just a hair or push it in and out until you get a signal..A purple screen with the words ROKU should show up on TV.If you have a bad port on TV it would have to be replaced but this is rare,if you have a second port on tv try that.Have you tried your ROKU stick on another tv?Does your streaming stick go in vertically or horizontally,if it goes in vertically it may be pressing against side of tv prohibiting a good connection.You could try a HDMI cable, plug the HDMI cable into tv and put ROKU in other side of cable.There is also a restart button on ROKU stick push it and it will start blinking,if it doesn't light up you may have a defective ROKU stick.

Mitsubishi wd-60737 HDMI port 1 connected to cablebox. Screen is black and no sound. Cablebox is on, all cables connnected correctly and was previously working. Nothing new was done.

have you tried resetting your cable box? you can do this usually by either holding its power button in until all 3 lights light up, or by unplugging it from power , wait @ 30 seconds & plug back in .

I have a 2009 Lg 37lh30 Tv and for the most part it works until recently. I am now getting a HDCP rejection when using an Apple tv or Roku and no screen when using my bluRay Player (which use to work

Some TV's & cables are not HDCP compliant . Sometimes you can replace the cable to fix the problem & other times you have to replace the tv because its not HDCP compliant . First check to see if your tv is HDCP compliant .

Why doesn't my ROKU streaming stick work on this TV?

If you are cornered and baffled over which streaming device to purchase, you need to examine the new Roku streaming stick. We have created this article simply for you to let you know the features of the Roku streaming stick which best suits users streaming needs. We are on an online informative service too to help Roku users get the best info and assistance on almost all of their streaming players and other technical assistance.
The new Roku streaming stick is recognized as among the finest devices you could discover at this lowest price for the features it offers. The "Private listening" feature is usually accessible on the Roku streaming stick, allows users to automatically mute the particular TV's audio tracks and listen closely to the sound through the private hearing jacks provided along with device package. The user can also use this same feature through their mobile remote app.
The app seems to be well sync with these new new Roku streaming stick and found to be much efficient with this device. Although the developers say it is about the same streaming speed since the Roku 2. If you are seeking for that most effective "ac" Wi-Fi standard, which an individual can anticipate finding in the Roku 4 and Chromecast, then you are about to be disappointed. The remote features finds to more responsive and is incredibly very good and quick.
The Roku device takes about 28 seconds to get it powered, which often is quicker than its peer brand names like Chromecast and Amazon Fire TV stick. They perfectly suit into the HDMI plug-ins of all most every TVs. In the event if the user find an problem in fitting them to the TV then use the Power cable to perform the trick. Attempt to make use of the port saver, if the connection to the TV is not appropriate or too tight. The user should never overlook using the remote app, which allows streaming easier for Roku users.

Hope this article let you understand the features and functionalities of Roku Streaming Stick. In case of any assistance required on purchasing or activation of these Roku products users can contact our team experts for instant and reliable technical solutions. Users can contact us through the toll free number at +1-888-269-1011 or visit


Out of no where my Vizio won't show cable, Blue Ray, or shows on Roku. One of the HDMI ports hasn't worked well for awhile so would have to switch HDMI ports to watch Roku or Blue Ray, but overall worked...

you may need to change the HDMI board in the tv. it will be the hole board the parts are just to small to replace them all to get the HDMI board working again. find a second hand replacement. should be fine with another known working one.

Can someone please help me get my laptop working through HDMI cable onto TV on a sony VAIO VGN-FW23G. I need to know the process to do this

1. Check the computer for changing output (some computers use <F5>, <F8>, depending on which brand they are. I believe Sony uses <Function><F7> or <F7>).
2. Check what channel the HDMI port is on (e.g. AV1, HDMI1, HDMI2, etc.) - you need to know this if your TV doesn't automatically switch to the new input.
3. Plug the HDMI cable into the TV HDMI cable-in port.
4. Plug the HDMI cable into the laptop HDMI cable-out port.

5. Turn on the computer.
6. Press the <Function><F7> simultaneously ONCE. The screen should flicker and show up on TV.
7. Sometimes you may have to go to "Display Preferences" and select Dual Monitors or external monitor if your computer doesn't do it automatically. Repeat Step 6 after.

** You may have to adjust Display Resolution to 1024 x 768 or lower in order for the TV to work. After it works at a lower display (800 x 600, for example), you can adjust the resolution to the maximum the TV can accept.

Roku 5.1 sound issue
Dec 10, 2017 • Roku LT

Can't get sound out of the LT-46151 - mute is not on.

turned on tv no sound this morning and nothing mute not on worked last night
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