Question about Panasonic Televison & Video
Both video and audio seem fine when it's on, but I cannot change input source. It's now always on HDMI2 which was the input (Comcast TV tuner box) when it was working the day before yesterday. It turns on and off with a sort of rhythm, 7-8 seconds on then 7-8 seconds off. I have to unplug the power cord to turn it off completely. When I plug in the power cord again, it doesn't turn on by itself, I have to press the power button, sometimes even twice to turn it on. Then it starts turning itself off and on again. I removed all the remote controls from the room to make sure it wasn't caused by bad remotes.
This could cause a problem, because modern TVs and most other entertainment electronic goods, have a small kind of computer chip, but there should be a Reset button probably inside the set! If you feel confident about computer chips you may be able to find the button by tracing the circuit.(Disconnected from the mains). Another idea is if there is a small button cell or battery inside, then try disconnecting it for a day. Good Luck!
Posted on Dec 02, 2006
You should be able to get a replacement keypad, and that's not a hard job for a DIYer.
If you're interested, post your correct brand and model and I'll give you a more specific suggestion.
(Your post subject says Jenn-Air M169B put it's posted under Sharp R-316FS so I'm not sure which you have).
If it's a Jenn-Air, you can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383
You can usually find Sharp exploded views by entering your FULL model number here: http://www3.sears.com (the 3 is correct)
You can order Sharp parts from there or from Tritronics at http://www.wehaveparts.com
We're happy to help and we appreciate your thoughtful rating of our answer.
Posted on Jan 21, 2008
The number of flashes is an error code. Count the number of flash. It looks like one of the boards in your set is failing intermittently. Panasonic codes for a guide as a starting point. Exact board STILL has to be verified;
One Blink: One blink of the power LED indicates a problem in the inverter circuit located on the LCD panel. The inverter board is not to be repaired in the field. Therefore a replacement is required.
Three Blinks: Three blinks of the power LED indicates an over-current or over-voltage condition in one of the DC supplies of the AP board. The AP board is repairable. Therefore the use of an ohmmeter and peak-hold-voltmeter is required to determine the cause of the shutdown. An over-voltage condition is definitely a defect of the AP board. An over-current condition may be due to a short circuit located in the AP board, A board, or the LCD panel.
Five, Seven, or Eight Blinks: The A board is responsible for five, seven or eight blinks of the power LED. The MAIN +3.3V, MAIN +5V, and MAIN +9V sources are all produced on the A board. The detection input pins of the MPU, IC1100, monitor for their presence.
Four or Six Blinks: The AP board is responsible for four or six blinks of the power LED. The DTV9V, and SUB_5V sources are produced on the AP board. The MPU IC1100 monitors for their presence when the unit is connected to AC Power. A short or open circuit on the A board may also be responsible for their absence.
Nine Blinks: Nine blinks of the power LED is due a short circuit in the audio output circuit (s) of the unit. The audio output circuit is located on the A board. Confirm the status of the speakers. If defective, perform a replacement. If ok, replace the A board.
Ten Blinks: Ten blinks of the power LED indicates a malfunction of IC4200, the frame converter. This IC resides on the A board. Therefore ten blinks of the power LED requires the replacement of the A board.
Posted on Feb 11, 2009
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