Question about Mitsubishi LT-52148 52 in. LCD HDTV

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I have a LT-52148 that turns on with sound for 2 seconds and shuts off.I tried to reset several times without success.Any idea what the problem could be? Mike

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Hello,
Its the problem of overheating in the power supply board of the TV.on the power supply board of the TV there are few capacitors and IC.any of this IC is got short or may be weak.so due to this when you start the TV the current passes from electric outlet to the power supply board of TV.but when the current passes from that weak/faulty part at that time current gets stopped or slow and the board overheats and TV shuts off. this is a common problem faced by many other users too.the possible option to solve this issue is to check the power supply board by a meter and continuity tester and replace the faulty component on the board which is short due to which power supply board is getting overheated.its bit technical job but yes its not at all a costly repair to do or get it done by the technician. for required parts it can be easily available from local electronic hardware shop. This will help. Thanks

Posted on Aug 30, 2010

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Posted on Jan 02, 2017

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When i turn on my tv it tries to boot, blue mitsubishi home screen come up, i hear fan then it all shuts off while green light blinks.


Try a reset. Start by unplugging for 1 minute, then plug back in & if still won't restart try the following. If none of the following work, you will need a technician.

Initializing the TV in many cases can remedy a problem.
In the 2006 product line Initialization is now a user function.
Pressing the front panel "INPUT' and "FORMAT"
buttons at the same time activates Initialization. When
complete all user settings will have to be set again. The
table in Figure 4-3 list the User Initialization procedures.
Note: Pressing INPUT and FORMAT is the same as
the Initialization in the Option Menu (MENU-2-4-7-0)
Order Name Procedure Results Notes
1 System Reset Press <System Reset>
on Front Panel
Hardware & TV operating
software reset.
POWER/Timer LED flashes for 60
seconds. No customer settings
are changed.
2 User Initialization
Press <INPUT> &
<FORMAT> on Front
Panel at the same time.
All customer Audio &
Video settings are reset to
factory default.
All customer settings will need to
re-configured.
3 Reset System
Defaults
From the remote, press
<MENU> <1-2-3>
<ENTER>
All customer settings
except V-Chip are reset to
factory default.
Netcommand, Channel Memory,
etc., will need to be re-configured.
SERVICER
PROCEDURE 4 Initialization
From the remote, press
<MENU> <2-4-7-0>*
select "INITIAL" press
<ENTER>
All customer settings are
reset to factory default.
All customer settings will need to
re-configured.
MITSUBISHI RESET / INITIALIZATION CHART
CUSTOMER
PROCEDURES
Figure 4-3
Figure 4-4
LED Indications
The front panel LEDs, refer to Figure 4-4, also assist in
determining the cause of a symptom. Figure 4-5 illustrates
normal LED operation. Figure 4-6 shows the
LEDs response when a problem is detected and indicates
the possible cause.
Power/Timer
Indicator
Status
Indicator
Lamp
Indicator Condition
Off Off Off Off (standby)
Blinking green
fast Off Off Initialization (10 - 65 seconds)
Off Off Blinking
green fast Lamp runs for 1 min after PTV off
Green Off Off Power On
Blinking green Off Off Power On Timer is set
NORMAL LED INDICATIONS
Power LED Status LED Lamp LED Condition
High Temperature - check ventilation air flow.
(Temperature sensor is disconnected.)
Off Off Blinking yellow Lamp cover is open.
Lamp failure (Lamp fails to turn on)
Off Off Red (Lamp turns off after lighting)
Lamp is broken
Off Blinking Red Off Fan Stop
Off Red. Off Circuit failure. (Run Error Code Check)

Apr 08, 2015 | Mitsubishi WD-65731 65-Inch 1080p DLP HDTV

1 Answer

Replace power supply for mitsubishi LT-52148


see this instruction. God bless you

    • 1
      Unplug the monitor power cable. You should never attempt to disassemble an electronic component without first detaching it from its direct power source.

    • 2
      Remove the screws from the back of the monitor and along the edge of the screen. Depending on manufacturer and model, LCD monitors will have screws located on different parts of the monitor's body. Once the screws are off, use a flat-tipped tool, such as a knife or a screwdriver, to pry the monitor open by dislodging the two halves; be careful not to tear wires connecting the two halves.


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    • 3
      Locate the power supply unit and take its metal casing off. Once again, different models of LCD monitors will have the unit placed in different locations. With the casing undone, unplug cables running from the power supply to other internal components. Mark the cables that you unplug from the power supply--you will have to plug them back in to the new unit.

    • 4
      Dislodge the power supply from its dock. In some monitors you might have to undo screws that hold the power supply unit in place. Remember the orientation of the unit as it was placed, because you will have to insert the new unit in exactly the same way.

    • 5
      Insert the new power supply into the dock and screw it in place. If you do not have a new power supply, read the label on the existing one to order a new one from the manufacturer or from a third-party supplier. Obtain a power supply unit that is compatible with your LCD monitor; never try to use a generic spare. After installing the new unit, plug in the cables exactly as they were in the old unit.

    • 6
      Put the power supply casing back on and reassemble the LCD monitor frame. Gently clasp the two halves of the monitor shut, making sure you have reattached all cables that you unplugged to take the monitor apart. Close the casing, tucking away all cables neatly so they do not get in the way of the monitor casing.

    • 7
      Put all the screws back on. Once done, you should have no leftover pieces (screws or cables).


Read more: http://www.ehow.com/how_6165539_replace-lcd-monitor-power-supply.html#ixzz2ZJV8TbYP

Jul 17, 2013 | Mitsubishi LT-52148 52-Inch 1080p LCD HDTV

1 Answer

No sound at all on Mitsubishi LT-52151. Fixed before by unplugging, waiting 30 seconds, plugging back in. Was occurring more and more often to the point of having to do this every time I would turn it on....


Just fixed this on my TV today! (after 2 months of the sound intermittently failing to turn on and failing completely yesterday) Go to Mitsubishi-tv.com. Go to support. Enter your model number. You will be directed to the documentation for your model which will include a zip file for a firmware update and a PDF file with instructions for installing the update. This fixed my sound.

Mar 02, 2011 | Mitsubishi LT-52151 52 in. LCD HDTV

1 Answer

Basically i plugged in the ac adapter to it, pressed the power button and the power light comes on for 2-3 seconds then the power light shuts off. lcd screen never turned on or show anything, fan never...


>>> Please leave feedback so I can continue helping You & Others
Hi,

The middle blue led is the charging indicator, sounds like you have (at least) a bad battery, remove it, plug in AC and try again, if no good, remove the HD and repeat, if no good, remove/replace the ram and repeat, if still no good, your mainboard is cooked.

Thanks,

Adam.

Feb 19, 2011 | HP Pavilion DV9429US Notebook

1 Answer

Mitsubishi LT-52148 lcd tv turns on for 2 seconds with sound and shuts off.Tried resetting.What could be the problem?


The lamp LED indication flashes?When was the lamp replaced?The lamp has not been replaced 1 1/2 or 2 years.The lamp life is over.Require a new lamp.

Sep 01, 2010 | Mitsubishi LT-52148 52 in. LCD HDTV

2 Answers

Change oil soon light. how to get it to shut off


Answer The "change oil" light on a 2001 Grand Prix is reset by pressing the gas pedal three times while the vehicle is in "accessory" mode:

1. Turn the car off.
2. Place the ignition key in the "on" position, without starting the car. That is, turn the key forward to the place right before it fires the engine.
3. Place your foot on the gas pedal and press it all the way down three times, waiting approximately one second between presses.

If done correctly, the "change oil" light will flash repeatedly, and will then reset.

Please note that it is rare to do this successfully on the first try; if it does not work, turn the car off and try the procedure again, varying the wait slightly between pedal presses at each attempt

Apr 16, 2009 | 1998 Pontiac Grand Prix

1 Answer

HOw do you set the clock on an RCA RP9328A stereo without remote?


I have this system. According to the manual you have to do the following. 1. Press and hold the TIMER/CLOCK button until CLOCK appears in the display under the time. 2. Press the SET button once and the hour will flash. 3. Use the << or >> buttons to ascend or descend to the correct hour. 4. Press the SET button again and the minutes will flash. 5. Use the << or >> buttons to ascend or descend tot he correct minutes. The time will flash for a few seconds and be set when it stops. I have tried those steps and you may have to do them a few times in order to get the time right. It's a little tricky. I haven't bothered to reset the time as I have other devices that display the time without the back and forth with this device. It's a nice system and the sound is okay for my purposes. Hope this helps.

Mar 14, 2009 | RCA Audio Players & Recorders

1 Answer

Pot keeps shutting off after coffee completely brewed.


This may be an electrical issue, but I would try holding in the on/off button for a few seconds and see if it still displays 2 hrs as the auto-off time. If 2 hrs does display correctly, unplug the unit for 16 minutes or longer - do not plug it back in a single second shy of 16 minutes. Then reset the clock and reprogram the auto-off Try one more time.

If that fails, it may be replacement time.

-Tha Mp3 Doctor

Nov 28, 2008 | Cuisinart DGB-500 Coffee Maker

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