Samsung pn64e550 power cycling

[microvibe]

I have 64e550 thst comes on picture and sound then restarts sometimes restarts constant others it's on for 5 minutes or so.
Pson 3.35v when in standby .12v when on
Stby 5v on standby 5v when on
15v shows 15v
5v shows 5v
Vs 217v
Va 56v

[attainteddragon]

Re: Samsung pn64e550 power cycling

you could try running the test patterns and see if runs smoothly.

[microvibe]

Re: Samsung pn64e550 power cycling

In the test pattern it does same things so it's not the main board.psu model is bn44-00515a

[attainteddragon]

Re: Samsung pn64e550 power cycling

if all of your voltages are remaining stable (command, vs, va, v-scan, -vy etc.), then to me it looks like your control board has issues then. hopefully some others can let us know if this might be right or not.

[microvibe]

Re: Samsung pn64e550 power cycling

Well the TV is running the voltages seem to stay what they're supposed to be but then it just shuts off and tries restarting just does it it over and over sometimes I will restart and run for a bit. So would this be a power supply issue or is it something else that turns off power supply

[vinceroger69]

Re: Samsung pn64e550 power cycling

re solder even if they look good all parts that are fitted on too the heat sinks on the power supply as these are known to crack over time and cause this type of issue.

[microvibe]

Re: Samsung pn64e550 power cycling

I will go over the solder joints today try it out tomorrow. Yeah I don't understand what would cause the intermittent power issues want to try to power on a few times that I have to unplug it for a little bit plug it back in and I will run again anywhere from 5 to 20 minutes

[Electronic Handyman]

Re: Samsung pn64e550 power cycling

Hi there is a video chip that can cause that issueand sometimes a cap on the psu causes such issues. I'd forsure resolder all the connections that you can and then see how the set works. You may wish to try some freeze it later.

[microvibe]

Re: Samsung pn64e550 power cycling

Update tv is working for last 24hrs. As suggested I retouched all solder joints. They really didn't look bad but guess it's that fussy. Thanks for the help.

[Electronic Handyman]

Re: Samsung pn64e550 power cycling

Thats good to hear , let us know what happens in the long run thank you

[vinceroger69]

Re: Samsung pn64e550 power cycling

I will go over the solder joints today try it out tomorrow. Yeah I don't understand what would cause the intermittent power issues want to try to power on a few times that I have to unplug it for a little bit plug it back in and I will run again anywhere from 5 to 20 minutes

I have had this issue two times on samsung psus and both times re soldering the parts on the heat sinks and on the transformers fixed both sets im glad you have seemed to of fixed your set too its nice to have a easy fix once in a while.

[GarrettN]

Re: Samsung pn64e550 power cycling

Update tv is working for last 24hrs. As suggested I retouched all solder joints. They really didn't look bad but guess it's that fussy. Thanks for the help.

Has it been holding up for you? Own the same TV, had the full power supply replaced 2 times under warranty, 3rd time post warranty and it is doing the same as yours the 4th time.

The prior 3 were new power supply boards, but if this is all it is, much simpler. Will try on mine and see how it works.

[microvibe]

Re: Samsung pn64e550 power cycling

Ya it's been going strong since used everyday