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They call me......."threadkiller"
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Re: Samsung UN55F6300AFXZA appears dead, stand-by present, main board suspect
Did you try Dannyx's fix in post 54? looks like a nice alternative to buying a new mainboard if I understood it correctly or did you not have an image on screen with flashlight?Last edited by nomoresonys; 05-23-2019, 09:25 AM.Comment
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Re: Samsung UN55F6300AFXZA appears dead, stand-by present, main board suspect
There was no image on the screen at all, flashlight or otherwise.
The replacement main board arrived this AM. I installed it in to the TV and now the TV works!
This was a long thread with a lot of participants. Thanks to everyone who contributed to helping me with this issue! I'll be testing it today and I'll let you all know what the final outcome is.They call me......."threadkiller"Comment
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Re: Samsung UN55F6300AFXZA appears dead, stand-by present, main board suspect
Glad to hear it.
Last edited by nomoresonys; 05-23-2019, 12:33 PM.Comment
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Re: Samsung UN55F6300AFXZA appears dead, stand-by present, main board suspect
So I used it for a week and all is well!They call me......."threadkiller"Comment
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Hey All,
I have a Sony 65x900f that I purchased cheap because of a no-power issue.
I assumed that because there is no standby light visible, it would be an easy fix - however upon opening up of the unit I can confirm that the 3v3 standby voltage is making it's way from the power supply to the main board. I'm a little confused as to why there is no standby light.
I am firstly wondering if anyone has this model of TV, or has worked on one and can give me some insight. I have tried to find a service manual for this model, to no avail - and would really appreciate... -
This is my first attempt at troubleshooting a board like this, I know I could just buy a new board but I'm curious to figure out how this works. I've been testing different components in the evenings this week and I think the problem is with the IC failing to start up for some reason. When the board is plugged in there is no standby voltage.
Then today it randomly sprung to life like a zombie but shortly died thereafter. I have no idea why it would have done that and its the first time I've seen it running. I discharged capacitors on the board last night, then it was sitting today.... -
Hi,
I recently bought an ASUS ROG STRIX B550-F GAMING motherboard that was listed as "dead, not powering on." However, it does show some signs of life. I've performed several basic measurements and would like to share the results.- The board enters a "ready to power on" state after plugging in the PSU.
- Pressing the power button increases power draw.
- Sometimes, touching the RSMRST_L pad with a multimeter probe causes the board to shut off and return to standby.
(taken after pressing the power button, while the board is attempting to start)- H_SKTOOC#
06-11-2025, 01:05 PM -
Hi. I got a Vizio with no power or standby, and won't turn on with remote or button. I checked the voltages on the connector and all read 0.00V or nearly 0(0.050 ON/OFF pin). None of the pins are labeled STB for standby although I do see some 5V pins. Other than the obvious standby led, which isn't coming on, is there a way to check for standby voltage on this PS. I'm trying to see if my problem is the PS or mainboard. Some Vizios I have fixed with no standby led me to think it was the PS but it turned out being the mainboard. Any experience with this set would be greatly appreciated. -
Hello,
I am trying to re-purpose this power supply that I saved years ago from a tv with a cracked screen for a monitor but that is not really that relevent at the moment. I do not recall which tv but a google search looks like it is from Wharfedale LTF37K1.
You may notice I made some alterations moving some components to the top and some wires which are from a 5v regulator I fitted to the 12v output as the monitor requires 5v. The standby was already at fault from the beginning, it has nothing to do with the alterations...
Years ago it had some bulging caps...
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