MAXENT MX26X3 L2614XW02L no standby light, no power on

[budm]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

"does the white arrow point to pin1" yes. So please verify that the +5STBY does stay at 5V first, then need to verify the ENABLE (PS_ON) pin.

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

i dont understand. i thought i did this already? none of the pins on that connector change. there is a 5v on one pin and the other 2 are zero and do not change when i push power...

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

if the white arrow points to pin 1, then it is pin1 (red) has 5v, pin 3 (black) has 0v, and pin 5 (purple) has 0v and none of them change when pushing power

[budm]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

OK, I misuderstood this one "i did notice that when i measure the voltage on CN6 Pin1 it drops from 4.98 to 3.6 when i push down the power button. when i release the power button it goes back to 4.98" and got confuse with the +5STBY, sorry about that.
So basically the ENABLE PIN is stuck at 0V. You can force on the power supply by disconnect the ENABLE wire from the connector so it will no longer has connection back to the main board because we do not want the main board to stop the ENABLE to go HIGH when we force on the power supply by connecting a 500~1000 Ohms resistor between the ENABLE pin and the +5STBY. We know that you do have bad main board, for 26" TV I really do not know if you can get much from it when you try to sell this TV.

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

well im not really planning on selling it...was just gonna use it...
if i can fix it..
so you're thinking its most likely a problem on the mainboard?
i guess ill have to try what you said and see if that turns it on.

[budm]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

@ this you do have main board problem.

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

ok i did what you said and i was able to force the power supply on. the backlight lights up but the power LED doesnt...and the power supply fan does not come on either.
i guess its the mainboard that turns on the fan..
so i definitely have a motherboard problem?
but where? what component is failing me?

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

its definitely something to do with those voltage regulators only getting 1.31v and 2.13v input....

what feeds the resistors?

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

ok now this is strange (or maybe it isnt?)
when i have the power supply forced on, now i get correct readings on all my voltage regulators...what does that mean?
besides that theres nothing wrong with my voltage regulators?

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

hmm ... now when i press on the heatsink, the backlight turns off..when i release the pressure it comes back on..

whats going on there?

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

theres no way i will pay 100 dollars for the board...the tv is hardly worth 100...
this place has one for 25 bux but they say it heats up after an hour. i wonder how bad?
http://www.tvpartsguy.com/servlet/th...N-BOARD/Detail

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

any ideas how to track down the problem on the mainboard?

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

anyone? please?

[budm]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

Sorry I cannot help you on the main board repair. I did not fix the bad solder on the one that I work on years ago, some people suggested to reflow the board.

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

dang...really? well at this point i dont have much to lose, so how can i go about doing a reflow?

also what do you think about the link i posted for the board for 25 bux but it supposedly heats up...? would that be something i might be able to fix after i got it?

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

i caved in and ordered the board. i guess ill see how hot it gets and if i have to ill try putting fans on it... hope i didnt just throw away 30 bux!

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

in case anyone's curious how this turned out, i got the board in the mail today and plugged it all in. thing works fine! idk what they were talking about with the heating up issue cause ive been running it a few hours now and it doesnt seem any warmer than any other TV... sad i had to pay 30 bux instead of actually being able to figure out what went wrong with the motherboard...but oh well! at least i can tell which board it is!

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

i guess i spoke too soon... im not in the clear yet... now that i have the tv running for a while i have a few other problems.

1. the buttons do unexpected things like they are pushing 2 buttons when i only push one or sometimes when i try to change input, it thinks i pushed power off (on the opposite side of the button board) and half the time when i push menu, it changes the input AND brings the menu up. or it does nothing. or it just changes input or it just brings up the menu. and well heres the worst part... this makes navigating the menu not just confusing. but actually impossible to get to certain settings. and i tried a long time. some of the buttons are just not working right and i cant move up and down the menus. i know i could possibly solve this by getting the remote for this tv. i have a universal remote but i guess its not the greatest because the menu button is not implemented. also even though i can bring up the menu via the front buttons, i then cant use channel up and channel down to move in the menu either. i guess those buttons are not emulated for this universal remote. its a GE version 2 remote...
but anyway i would really like the tv to work without needing a remote, so what could be going on here? i took the button board out and had a good look at it and couldnt see anything wrong there. but looks arent everything. something could be defective in there. then theres the cable..but how likely is it that a bunch of wires are going to fail? and then theres the what if theres some problem with this motherboard they sold me besides the supposed heat problem...and it cant read the button board input properly or something. is that possible?
this guy on ebay wants 20$ for it and he's selling as is untested.
http://www.ebay.com/itm/IR-Sensor-Bo...item1c3eca5891
thats robbery. how does he sleep at night??? i'd pay 10 max. 5 if its not even guaranteed!

dang this post is getting long. is that ok? keep reading to find out!

ok problem number 2 that i noticed:

i got this tv running earlier today, and had it running for a few hours and browsing the web but not playing any videos. i didnt notice any problems other than the button board not letting me use the menu, for a lot of things but mainly to adjust the horizontal position. it is just a little bit off.
i turned the tv off and went out for a few hours...and when i came back i was determined to get to the bottom of this button board problem..so i took it apart and was trying to get that working better with no success.
i decided "oh well it works good for now" so i put it all back together but i only put in just a few screws not all of them (its a bit excessive in my opinion especially if im probably going to be taking it apart again soon)

so to really test the quality of the picture i proceeded to play some youtube videos fullscreen in 720p with desktop resolution of 1366x768 and when the second or third video stopped, i was going to reach for the mouse to play another one, the screen just went all crazy vertical lines...green and orange i think and i couldnt see any picture. i changed the input and it changed the vertical lines a little but still no picture. so i turned off the tv, waited a few seconds, felt the back of the tv and it was not very warm. the tv had been cold and i only had played videos on it for 15 minutes tops. so i turned the tv back on and it was fine again. for another couple videos and then it did it again. a few seconds after a video ended but before i could launch the next one.
so maybe this is the overheating problem they are talking about?
thats when i noticed the fan was varying its speed. slowing down when the big video processing was over. so apparently it matters what you are watching on the screen. moving a few windows around and browsing the web doesnt cause the fan to run loud but when u play actual high res video it does.

it's pretty annoying to have a fan in this tv making all that noise. my much larger vizio 37inch tv doesnt even have a fan. why does the maxent need one? its a smaller TV and it cant even do 1080p!

anyway i guess i could unplug the fan, and just add some case fans and have them running all the time (they would still be much quieter)
those fans run on 5v, right? or is it 12? and whats a safe way to tap into that to run them?

ok there, after all that explanation thats the only question i really want answered.
that and the button board thing. could i have a defective button board? or did they sell me a motherboard with more than one problem?

ugh. im really sorry if this was just a huge waste of your time but i think the details are important to the solution so i include them and that makes it take forever to read! sorry! and thank you for caring!

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

i thought i should mention i ran the tv playing a longer youtube file (still in 720) and it ran for at least an hour ...ran fine..i turned it off cause im going to bed. so yeah i think it might be that the fan slows down too soon after a video is done playing and the chip is still too hot to have the fan just slow down on it.

i will wait for advice on the best way to add fans. really dont want to make a noob mistake and ruin a good thing!

[triplefour]

Re: MAXENT MX26X3 L2614XW02L no standby light, no power on

so after resting all night, i turned on the tv and almost immediately it fouls up and goes to the vertical lines... turning off and resting for a while do nothing. i took the thing apart again and felt around all over the motherboard and everything is just nicely warm. nothing hot. i feel like i got ripped off here. they said it was an overheating problem but its starting to seem like something else.. or if its is an overheating problem then some component on here has a real low tolerance for heat. also, pressing on the heatsink does not correct the display. i dunno what to do but im pretty sick about having possibly gambled that 30$ away... what should i look for on the motherboard to be causing this type of problem?