Question about Sanyo Televison & Video
I can turn on the tv, the standby button goes from red to blue then Sanyo appears in red on the screen and then safe/dynamic mode appears very briefly. After this it's just a black screen, the remote doesn't do anything, not even turn the tv off and the panel on the front left of the tv does show white lights when touched but again does nothing. I have tried unplugging all leads and plugging back in and I have replaced the batteries in the remote. The tv is only 18 months old. Please help.
You have a power supply problem.Most brand they have modules.
If you can open the back you will see a few separated Modules.You
will see a power supply module just replace it Take note of the connectorsThey have letters usualy to match the plugs.
By the away do you have any sound?
Posted on Nov 01, 2012
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Posted on Jan 02, 2017
i think your capacitor is blown, do a google search for insignia, lcd, capacitor...
you can buy another one for about $2 but its a pain to install, you can also instead buy a new powerboard for about $80, its an east install and you wont blow more capacitors
Posted on May 15, 2008
SOURCE: Tv will not turn on
This could probably means that the power relay is working, though there could be bad contacts.
Since the fuse doesn't blow, now you need to check for:
Other blown fuses - occasionally there are more than one in a TV.
Replace with one of exactly the same ratings.
Open fusable resistors. These sometimes blow at the same time or in place of the fuses. They are usually low values like 2 ohms and are in big rectangular ceramic power resistor cases or smaller blue or gray colored cylindrical power resistors. They are supposed to protect expensive parts like the HOT but often blow at the same time.
If any of these are bad, they will need to be replaced with flameproof resistors of the same ratings (though you can substitute an ordinary resistor for testing purposes). Before applying power, check: Rectifier diodes, horizontal output transistor, regulator pass or chopper transistor (if present), and main filter capacitor for shorts.
An initial test with an ohmmeter can be done while in-circuit. The resistance across each diode and the collector to emitter of the transistors should be relatively high - a few hundred ohms at lest - in at least one direction (in-circuit). If there is a question, unsolder one side of each diode and check - should be in the Megaohms or higher in one direction. Removed from the circuit, the collector-emitter resistance should be very high in one direction at least. Depending on the type, the base-emitter resistance may be high in one direction or around 50 ohms. If any reading on a semiconductor device is under 10 ohms - then the device most likely bad. Assuming that you do not have a schematic, you should be able to locate the rectifiers near where the line cord is connected and trace the circuit. The transistors will be either in a TO3 large metal can or a TOP3 plastic package - on heat sinks. The filter capacitor should eventually measure high in one direction (it will take a while to charge from your ohmmeter). It could still be failing at full voltage, however.
If you find one bad part, still check everything else as more than one part may fail and just replacing one may cause it to fail again.
Assuming everything here checks out, clip a voltmeter set on its 500 V scale or higher across the horizontal output transistor and turn the power on. Warning - never measure this point if the horizontal deflection is operating. it is ok now since the set is dead. If the voltage here is 100-150, then there is a problem in the drive to the horizontal output circuit. If it is low or 0, then there are still problems in the power supply or with the winding on the flyback transformer.
Other possible problems: bad hybrid voltage regulator, bad startup circuit, bad standby power supply (dried up filter capacitor, etc.) bad relay contacts as mentioned above. However, these probably would not have blown the fuse in the first place so are less likely.
Posted on May 21, 2010
You either have the power supply module or back lights inverter board problem, need to narrow it down.
Please see my basic troubleshooting guide here:
Parts: try www.shopjimmy.com or Ebay
Posted on Jun 16, 2010
SOURCE: i have a new 42"
I'd tell you how to repair it, but it'd void your warranty, and I never advise anyone to void their warranty, so I suggest you take it back and get it fixed or replaced under warranty.
Posted on Mar 15, 2011
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