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NO POWER ON BOARD

NO POWER

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When you connect the power adapter into the laptop, does the power LED light up? If not then - The battery adapter or the adapter's power lead or the laptop's power socket could be faulty. Check power adapter's DC plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced. If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard. This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

Posted on Dec 30, 2012

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Call in a repair specialist. You have done everything you can do.

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I HAVE REPLACED THE POWER BOARD. STILL WONT COME ON. CHECKED THE CIRCUITS. YES POWER IS TO THE BOARD. COULD IT BE THE SIGNAL BOARD?


Hi Pam,
For a TV to come on, the power board has to send 'stand by or SB5V or 3.5V ' to the main board. On your pressing power on button on remote control, the main board sends power on command to the power board which in turn produces all the necessary supplies to run the TV. If the main board does not respond to your TV on command, the TV will not work. So It is not the power board which is responsible for not powering on of a TV every time. A voltage investigation before changing boards is always helpful. I hope it helps.

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What makes the HISENSE LCD (Model LCD 42W58P1) power supply failed to produce output voltage goes to the main pc board?


Hi,
First of all the power supply makes 'Stand By 5 or 3.5V which goes to main board. When we give power on command to the TV the main board sends 'stand by or Power ON' command to the power board which then makes other necessary voltage for the main board as well as other sections. If the power board does not receive 'Power On' command from main board, it will not produce the necessary voltages to operate the TV set.

May 20, 2015 | Hisense Televison & Video

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No audio or video flashing 2 power 1 opc after relay latch?


Yes,this problem are related to the main Tuner signal board,must change the main Tuner signal board,to solved this problem.Put back your old power supply board too might be still good,but some time the power supply board must have to be replace too,becaused it got corrupted by the data from the main CPU from the main Tuner signal board.

Feb 20, 2013 | Sharp Aquos LC-46D62U 46 in. LCD HDTV

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I have a panasonic TC-P42C1 blinks 10 times no picture no sound What is common to go on this model (which board)?


Check the tv power supply board.That the board where the tv power A/c plug into it.Check the tv power supply board carefully for dying components parts that are called capacitors parts.Bad or dying capacitors parts on the tv power supply board are alway causes this problems to the tv.Bad or dying capacitors parts are very easily to spots,all these capacitors parts are alway bulges up onto it tops.Never have plats round tops as they suppose too.U have all the tools and know basic electronic also can do basic soldering work,u should changes all these dying capacitors parts in the tv power supply board with no problems at all.If u check all over the tv power supply board and it have no dying and leaking capacitors parts to the tv power supply board all.Then the tv Y-Sustain main logic Tuner board it is the causes and the problems.The tv Y-Sustain main logic Tuner signal board that is the board that take in the tv imcomming tv broadcasting signal cable plug into it.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish tv power supply board and or the tv Y-Sustain main logic Tuner signal board for the replacement.

Nov 06, 2011 | Panasonic TCP42C1 Plasma TV

2 Answers

Will not power up. Tested from plug to power board. Power does not leave power board from any terminals.


The power supply board could very well be defective. I would also check the Zsus board and the Xsus boards. If either of these boards fail it could also cause the power supply board to fail.
You can unplug the connectors to the zsus board at the power supply and try to turn the set on. If it does turn on, the power supply board is ok. If not, the power supply is bad. If the power supply board is ok, undo the plug connectors that power the Xsus board and hook up the plug connectors to the Zsus board. Turn the set an and see if it stays on or shuts down. Part numbers should be on the boards. Zenith is really LG Corp. Their customer support number is 1800-243-0000.
Hope this helps,
Steve

Nov 25, 2010 | Zenith Z50PX2D 50 in. Plasma HDTV

1 Answer

Power light is flashing green. i hold the power button it turns red. i press it again it turns yellowish then solid gree the screen comes on the 3 second later screen goes blank and flashing green power


Sharp tv are famous for this problems.Take ur tv aparts,where the a/c power cord go into it.That ur tv power supply board,check for all those dead leakage capacitors parts that bulges up on it top or puff up on it top.Than it ur power supply board,replaced those dead leakages capicitors or replaced the whole power supply board.No leakage capcitors on the power supply board.Than it 100% the Tuner board it dead,this board is where the coalax broacast tv signal cable go into it.This board can't not be repair only replaced,because it alway some ICS it the problems it dead on this Tuner board.Tries websties like Shopjimmy.com,Ebay.com to buy either or both refurbishes the power supply board or the Tuner board.

May 26, 2010 | Sharp LC32D47UT 32 in TV

1 Answer

Hi i changed colour cartridge tried trial run printer died; changed fuse in plug; still no power any suggestions please


in the printer there is a power supply board.there is a same type of 3amp fuse on the power supply board.if there is any kind of overheating in the power then the fuse in the plug and fuse on the power supply board blows out.in some cases only fuse on power supply board blows out.this fuse is placed on the board for safety reasons.because in the older model printers when this short circuit problem was happening at that time whole board used to blow out.so in the new model of printer a fuse is placed on the board ,so if any overheating or any power outage or any short circuit occurs.the fuse blows out instead of whole power supply board. You just need to replace the fuse on the power supply board by disassembling the printer.the power supply board is the green color square shaped board.its the board to which your power wire of printer is connected. the fuse is available at any local electric hardware shop.its not any special kind of fuse. This will help. Thanks please keep updated. please please do rate the solution positively .thank you for using fixya

Mar 18, 2010 | Lexmark X5150 All-In-One InkJet Printer

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