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Re: Toshiba MD20FP3 not turning on
Is a good thing the main fuse is not open,your problem is in the power supply ,as I understand you have no indication of power(no lights,No clicks)The 5 volts that power the microprocessor might be missing,this 5 volts usually come from a regulator,this regulator should have 12 volts in one side and the 5 volts in the other,the 12 volts come from the secondary of a transformer and it has its own fusible resistor,if the resistor is open is because the regulator is shorted and it need to be replaced.This is a good place to check.Be careful when checking this parts.If you are not too familiar with tv service seek the assistance of a servicer,it should not be too expensive.
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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. http://electronicshelponline.blogspot.com/
Power on the unit in the dark room then shine with the flashlight directly in
the screen, you will barely see the images. This is because your backlight is
not functioning. The following reason is the caused. 1. Power supply- missing
B+(supply voltage) coming from this board feeding the inverter board. This is
caused by faulty transistor, dried/leaky electrolytic capacitor, open fusible
resistor. 2. Inverter board- even
the B+ is good from the power supply, if the fuse, driver transistor, driver transformer
is faulty no output to the backlight resulting to black picture. 3. Busted backlight- even
inverter board is good but if this is busted resulting to black picture also.
Diagnosing the fault istechnicaland if you don't have necessarytools and test instrumentand can't fix it yourself, I would
advice you to look for anexperienced
technicianto isolate the
Hope I helped you.
Have a nice day!
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No you need the remote ! and even most universals will not do that function for you either!
You can order an orignal replacment remote from www.remotes.com and that will let you access all of the tvs functions!
I hope I was of big help!
Please rate my FREE response!
Something is preventing the power supply from operating:
Possible causes in order of likelihood:
1) Convergence amps failed overloading the supply (See if you can disconnect them)
2) High Voltage circuit has died. (Right on schedule since your TV is 10 years old)
3) One of the CRTs has shorted
4) The power supply itself has died (Is there a lot of dust covering it?)
See if you can isolate the failure by working down the list.
Hope Ya Fix it!
Not unless you have taken the time to learn all the safety issues concerning the HI voltage safety facts, in the repair of electronics? It sounds like your tv has a problem in the sweep/power supply circuits, and since these sets have NO user serviceable parts< its best too leave these types of repairs to a certified electronic technician. Good Luck