Re: Dell U3011T no power
Sorry, I thought you meant you wanted to see under the heatsinks....
pmontone
Member
Last Activity: 05-22-2017, 05:01 PM
Joined: 08-13-2013
Location: Melbourne, FL
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Re: Dell U3011T no power
Here are some closer pictures of the board....Leave a comment:
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Re: Dell U3011T no power
Here is a picture of the power supply.
The power input is on the bottom left as well as the bridge rectifier I measured.
There are 24V terminals on the left and 24V & 5V terminals on the far right of the board. I'm not getting any voltage there....Leave a comment:
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Dell U3011T no power
I have a Dell U3011T with no power on any of the 24V or 5V terminals on the power supply board.
I have checked the bridge rectifier and it is getting 119VAC and converting it to 159VDC just fine and I'm not really sure where to go from there.
I have checked some of the caps in circuit and they appear to be OK. I have also looked at 4 of the voltage regulators in circuit with my diode check on my meter and they all read around .5V which should be good.
Any help on where to go from here would be greatly appreciated, thanks!! -
Re: Sharp Aquos LC-60LE633U won't turn on, no lights
I had to replace my power supply. I just bought one on eBay.Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
I just got my replacement main board in today and put it in and tried to power the TV on and got nothing. I've got the same thing as before the unit refuses to turn on. I wasn't able to find the exact model main board for my TV the one I have is a FM17S and the replacement board is a FM24S.Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
OK, thank you very much for the help Tom. I'll try to find a replacement board and post the results.Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
No, no power was connected just using my meter for diode test.Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
tom, the diode you had me measure earlier that had 5.06V on it; while I was checking it with my meter diode function it was acting wired and appeared to be the only one doing this; but this diode would buzz then on my meter display the voltage would creep up until it got over 2 volts and then would read OL. Do you think this could be causing a problem or more likely the main board?Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
Here is the connector to the power board....Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
Wait sorry this is the wrong one let me upload the right connector...Last edited by pmontone; 08-14-2013, 04:00 PM.Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
Here is the main board....Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
Here is a better picture of the power supply connector....Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
Everything is dead except for pin 15, it has 5.06VDC on it.Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
My bad it looks like I was on the wrong point with the chassis wire, I took the board off the tv to test it and I went to the wrong spot when I took your measurement. I am getting 5.06VDC across that point and the diode.Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
Basically nothing .001 VDC. I was just checking that with my diode checkr on my meter and it looks as it may be bad. I get my meter to buzz on both directions of the diode.Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
OK, sorry about that thought that was still part of the AC circuit. I get 159VDC on those caps.Leave a comment:
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Re: Sharp Aquos LC-60LE633U won't turn on, no lights
I measured the voltage across the two caps above the power plug and got almost nothing, they both measure about 0.262VAC across the legs of the caps.
Here's a close up of the power connector on the top corner of the board....Leave a comment:
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Sharp Aquos LC-60LE633U won't turn on, no lights
Hi,
I've got a Sharp Aquos LC-60LE633U LCD TV that all of the sudden will not turn on anymore. The TV shows no lights or anything when it's plugged in and the power button won't do anything.
I've taken it apart and checked the fuses and the power cord and looked for any bad caps or burn marks but nothing. I have attached a picture of the power supply board.
Please, any help would be greatly appreciated.... -
Re: New Members - please post your introductions here
Hello everyone,
I found this site while trying to repair a friends LCD monitor and it was really helpful finding the source cause of the problem.
I am now looking to start repairing TV's as I have minimal skills working with them.
Thanks for all the help!Leave a comment:
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