Question about Hitachi 55FX48B 55" Rear Projection Television

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Will not power on......what could be the problem on the board?...i am good at soldering things...will replace if I new what to replace

Won't power on ......electrical strorm the other day

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  • bwshields Mar 22, 2008

    50"rear projection won't turn on. No storms or anything. I just unplugged it and moved in to a different room and it won't turn on. And yes the outlet is good.

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If have already unplugged and waited for atleast 15min. and still no success. Then only if you are Electronicly inclined. Check to see if you get dead completely or you get an indicator light momentarly. Which these are two different symptoms. first dead no indicator. check R931,E994,Q777. Then if indicator light comes on and goes off, check E994 which is fuse opening, C707-1000pf 2kv cap, also check D915, I601, IK04, and 05

Posted on Aug 16, 2007

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May just need to purchase a new one to be honest, not a lot can be done.

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My 19 inch technica lcd tv won't stay on


Good day!!!!


That problem is usually cause of faulty capacitors on the power supply board..

Just follow this instruction to fix your TV..

1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter..

Aug 26, 2011 | Televison & Video

1 Answer

We have a 46 inch sharp tv model number 46SB54U won't turn on. The green timer light is flashing. We just replaced the power supply board thinking that was the problem. TV still won't turn on...


Hello,

Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

I hope this will helpout ......

Jun 25, 2011 | Sharp LC46SB54U 46 in. LCD TV

1 Answer

Stand by button blinks 9 times when power button is pushed & it won't turn on


Hello,

The power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Good luck in solving the problem, and do take care in handling the fault, because it contains high voltages....

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1 Answer

My Kenmark 19" tv won't


Hello,

The power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.


Hope this will help in solving the problem, do take in handling the fault, because it contains high voltage..
Good luck

Jun 07, 2011 | Televison & Video

3 Answers

Had a loose power jack, replaced it, solder it (to the best of my abilities) put the whole thing back together, power worked once to charge good battery. Now, won't boot up won't power up. Take out...


By far the most likely scenario is that there is a short in the motherboard. A small error in soldering can cause this. Given that your computer is able to consistently power up and immediately power down, it doesn't seem like you have destroyed any components. This is much easier said than done, but a possible fix would be to re-solder the power jack. Using a soldering iron, carefully reposition the solder without letting it run all over the place... try to ensure that the solder is not making contact with anything other than the intended connections. If this does not fix the problem, or your computer refuses to boot, your motherboard may have been fried. It will have to be replaced in this scenario.

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My adaptor use to work fine now it wont work I found out it was the piece on the back where the adaptor plugs into, If I jiggle it and move it sometimes the power light will come on but it works fine with...


You can get that fixed if you can find someone who can solder. The jacks wear out over time on a lot of things. The jacks themselves are worth about $1 but it is the labour to open the case and solder a new one in.

The contacts in the jacks are spring loaded so these can wear or get damaged etc. So eventually they won;t make good contact and you get your problem. You see this a lot on laptops. You can twist or apply pressure on the plug until you get it to power up. This is more luck than anything when it works and eventually it will get to a point where it won;t connect anymore. This really is a simple repair but finding someone to solder the new jack in is the problem.

Feb 02, 2011 | Casio Keyboard Power Adapter

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I have a Samsung 40" lcd model LN40A53OP1FX2A


Could be,might not also,any things on the power supply board could be burn and dies,when it getting to much electricity current to it.Dead or dying capacitors on the power supply board are alway bulges or puffing up on it tops.Check the power supply board carefully look at all the capacitors parts,if require replacing,u must have tools like a soldering iron,a desoldering pump or a roll of desoldering braid,a roll of solders,also u must know basic soldering understand basic electronic to do it.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Dec 09, 2010 | Samsung LN40A530 40 in. LCD TV

1 Answer

Computer turns on. Key board and mouse doesn't work. Screen says PC entering power safe mode..red, green, blue..We took battery out, put new batter in. Nothing! Can't get it to do a thing, only turn on...


The northbridge from your motherboard is not making good contact on you MB. You need to replace *********** board or to reheat the northbridge with a heatgun, so the solder under the northbridge will flow and solders again to the board.

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Hp zv6000 batt ran down now will not charge or power up on ac power


This can be caused by a few problems, but I think yours is caused by a faulty power jack on laptop or your power adapter is no good.

Power Adapter: Plug it into the wall and notice if the light on adapter lights up or not. If it does light up, test it with a multimeter for proper voltage output. The output is labeled on the adapter sticker, an example would be "19 volts". If the adapter checks out okay then you need to look at where the adapter plugs into the laptop (power jack). If the power adapter did not check out okay, replace it.

Power jacks are known to come loose from the motherboard by the power cord being moved around from normal daily use. What happens is the jack breaks the solder joint and loses the connection. You most of the time see this problem getting worse by having to move your power cord around to get your charging light to come on.

If the computer is under warranty still, this is an issue you would turn it in for work. If it is not under warranty you are either going to need a replacement motherboard or replace/re-solder the jack (cheaper). If you are familiar with soldering circuit boards you can fix this yourself, if you are not experienced, you will have to take it into a electronics repair shop.

The jack and solder are very cheap, it is the labor that will cost you.

Hope this helps give you some direction as to where to look. Good luck.

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