Question about Mitsubishi WD-73740 73" DLP 3D 1080p Home Cinema HDTV with StreamTV In

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What does 4 red and 8 yellow blinking lights mean on my 73" Misubishi tv WD 73740? I have no picture or sound.

1)I held the power button down for 10 seconds. 2)I unplugged the tv for one minute.

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  • 11 Answers

Means u need a repair guy,lol, they are usually worth their time.

Posted on Nov 29, 2014


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017


SOURCE: Green Blinking Timer Light Mitsubishi WD-62527

hold the menu bottun for 10 seconds
after press power

see if that works

Posted on Nov 24, 2007

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SOURCE: MY mitsubishi model LT52246 went blank on me and

means the 12 volt line has a short some place. Look towards the inverters first.

Posted on Nov 04, 2010

Testimonial: "thank youso much on what board are the inverters located I have the manuel for this tv?"

  • 1229 Answers

SOURCE: The reset light is blinking

My first move would be to inspect the power supply board for bad capacitors. look for a bulged or skinned capacitor. Even if these capacitors look good, they may be failing. You will need an ESR meter to check for current. You will need an ESR meter for this. Then you will need to check the Mfs with another type of capacitor checker. These two types of capacitor checkers will be a necessity to find these failing caps. If the caps and voltages check out fine in the power supply, you will of course need to inspect and check the capacitors in the signal board. Definitely, there are bad capacitors in one or both boards. I have not repaired this particular model, but the symptoms you describe, tell where to look. Thanks for asking and show all hand of support!

Posted on May 02, 2011

Testimonial: "Thanks for taking the time to respond. I will follow your suggestions. I think it's a great palce to start. Much appreciation."

SD Tech
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SOURCE: Mitsubishi WD-73737 73 In. HDTV-Ready TV has sound but no picture

Have a look first at the lamp to see if it is intact.

Posted on Sep 01, 2012

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SOURCE: Mitsubishi 73"DLP wd-73638 won't turn on after power outage or getting unplugged

In most cases, this can be due to curropted software [firmware]. Contact the authoriized service center for Mitsubishi. Please do not try to update the software by yourself. It is a very skilled work to this set. Gopakumar Gopalan Google

Posted on Feb 24, 2014

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1 Answer

What does 4 red and 8 yellow blinking lights mean?

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.

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Why is tv blinking 4 red lights and 8 yellow lights

An error code of 48 indicates a main power board failure. There is a short down the 3.3v or 5v switched supply.
recommend replace main power board.

part# 934C409001

see the following website:

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sounds like the psu. power supply unit. check the caps are not bulged

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