Question about Panasonic TH-37PA20U/P 37 in. Plasma Television
I can't turn TV on. When I turn it on the power light stays on for 15-20 seconds then a "click" then the power light starts flickering. When that happens it won't go on nor can I turn it off.
To turn if off I have to puul the plug.
When it works' I get the 15-20 sec delay before it goes on
This happened about 6 mos. I kept trying a couple of times a day; after about 5 or 6 days it went on and has been ok since. I think I triggered that problem by trying to turn it off again during the 15-20 second warm up time.
And I think a visiting 7 yr old may have done the same thing to start this problem.
SOURCE: tv wont turn on
hello, usually if your panny is blinking it means theres trouble with your power supply but depending on the number of blinks cuased by a fualty or shorted internal board and this will cuase your tv to go into shutdown mode, it depends on your model number and year it was made.
your best bet is to have a qualified service tech give you a estimate for the repair needed. as long as your screen is okay it will be easy for the service tech to locate and fix your trouble
panasonic blinking codes can pin point the troubled internal part, these blinking fualts are cuase by internal boards with malfunctioning circuts info below for 10th gen 2007 2008 plasma model service
12 Blinks SOS: On the A board, transistor Q2301 monitors the Sound 15V line and the operation of the audio power amplifier IC2301. If the audio output circuit, IC2301, or the 15V lines develops a short to ground, transistor Q2301 goes into conduction and applies a high to pin 118 of the MPU, IC1100, triggering a SOS condition. The power LED blinks 12 times.
12 Blinks SOS: We have also discovered that 12 blinks of the power LED may also be caused by a defective SS board. To determine the source of the shutdown, disconnect the connector D5 and connect the unit to the AC source. If the panel turns on and the LEDs of the SS and SC boards stay on, the problem is on the A board. If the panel does not stay on, the problem is likely to be the SS board.
hope this helps
Posted on Dec 09, 2008
hello, you have a either your su, sd or sc boards fualty and it is a driver sos1 thats what the manual reads the best thing to do if your not electronically inclined or able to fix it is to get a service manual and make sure it is for your specific model and size you will find what the 7 blink codes mean, on my side i have a 42 in pana the service manual for this set and your is similar so since it is not the same model i cant tell you exactly what the truoble is but your best bet is to find a service manual find the 7 blink fualt then without getting ripped off you will know what the service man needs to do if you dont know or cant replace the parts yourself that is besides having to download firmware from your computer to a sd card and update your set but you need to solve the blinking code first it may solve the entire issue. the tv should come on when you resolve the blink codes or replace the fualty board or boards
Posted on Oct 14, 2009
Power supply board have dead capacitors.U know how to solders?Buy these capacitors to replaced them to have power back.Or u can buy a whole power supply board for the replacement at these websites Shopjimmy.com,Ebay.com for refurbish power suppply board.
Posted on Mar 04, 2010
That's a fairly common indication that a component in the main power supply called an 'electrolytic capacitor' is fading away.
These are used as filters and in feedback paths in switched mode power supplies and one of the parts on which mfr.'s safe a nickel or two. If these parts are not rated for the type of service they perform (higher frequencies and ripple current) they chemically break down and lose value until they no longer can serve their purpose.
If you open the back of the set after allowing a number of hours (overnight is better) with the plug pulled, look for a smaller circuit board with larger than average parts. Some of these will be blocks (transformers and chokes) and it will have cylindrical 'cans' that are mounted 90 degrees to the board. Look for a part number which may be on a sticker. If you can find this, contact Panasonic service in your area and ask about repair or replacement cost of this board. If either causes a faint heart, check on the site below to see if they happen to have this board on hand, it may save some money:
Subassemblies are normally plugged in and won't require soldering to replace.
Posted on Mar 19, 2010
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