MAXENT MX26X3 L2614XW02L no standby light, no power on

[triplefour]

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

ugh...now i cant get it to display normal even for a moment...
heres what im getting on screen:
please advise!

[budm]

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

Well, that shows the same display as the one I did not fix, I was able to push on the heatsink to make the problem comes on goes, that is what I found on mine. I did not the hot air work station at that time to experiment with.

[triplefour]

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

yeah pressing on my heatsink does nothing...how hard are we talking about pressing here?

[triplefour]

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

oh nice...now pressing on the heatsink does work. ok so that is totally the problem, not overheating. but i dont have a reflow station... is there any acceptable "poor man's way" ?

[triplefour]

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

pressing on the chip only barely works and i think its getting worse from it...when i can get a clear picture theres still a little "snow" dang i have 2 motherboards with different problems.... if only i could combine them somehow then i would have a working motherboard!

[Caleb]

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

many people have had success with a hot air gun, its not recommended as it is VERY easy to popcorn the chip. you would need some very thin flux as well. preheat in the oven then hit it with the hot air, but not for long.

[triplefour]

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

are u saying to put the whole board in the oven? at what degrees? and for how long?
and what is "thin flux" ? i have some really old can of soldering paste flux .... is that the same?

oh yeah and for now i solved the problem by wedging a wine cork and some tape inbetween the heatsink and the metal cover over the motherboard. it took a few tries to get the pressure just right but its been working for over an hour now with no problems. i have a feeling this will only work for so long though and i have to be careful not to move the TV...

[Caleb]

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

paste flux wont work, it has to be thin enough to go under the chip when heated, something like cs or kingbo, yes the whole board needs to be warmed up so you dont shock the chip. if it goes over temp it will never work again. Im not sure if you have a meter with temp sensors but that would be helpful in getting the chip to reflow without killing it. Or it might be just the excuse you need to buy a hot air station.

[triplefour]

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

yeah idk... hot air station is something im not going to be afford until i fix and sell a bunch of TV's ... the guy at the recycle place i can buy TV's from for 20 bux each has a hot air station though. he said he will charge me 40$ a chip to reflow things... might be worth it in some cases.... for now the TV is working fine with the cork in it...so maybe ill have him reflow it if and when that no longer works...then i would have spent 70 bux for a tv that i probably could have bought off someone on craigslist for 50!

[triplefour]

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

i guess what im saying is im going to stick to fixing only big TV's that i can get a return on my investment with...or small TV's if they are easy to fix and i get them for free.

[triplefour]

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

i guess i wouldnt mind trying the hot air gun and flux thing though if that could actually work. maybe ill try that myself before i take it to him... seeing that i have 2 of these chips now and im assuming the problem on the original mainboard was not the chip.

[Caleb]

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

just be advised if you overheat the chip you will have to buy a new main board. You can get a cheap hot air station for about 100$, probably wont last forever but at 40$ a reflow it wouldnt take long to recover your out of pocket money

[triplefour]

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

yeah the guy i was talking about said he has a 5000 dollar reflow station...
wonder if he recovered that!

[triplefour]

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

wait so why does ruining the chip automatically ruin the motherboard too?

[budm]

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

Try to find that replacement IC, then you will see why.

[triplefour]

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

i dont really understand... what replacement IC? well anyway the cork finally gave out... i can push really hard on the chip to get it almost working again but it wont stay and its too much pressure. so the TV is down again...and im out 30 bux for the motherboard unless i can reflow it. but i dont have 100 bux for a reflow machine...i might be able to cough up 20 for a heat gun but will a 20 dollar heat gun do the trick? jeez...id really like to be able to actually diagnose and fix the problem on the original board... seems like it might be easier than reflowing a chip...but we got stuck and if budm doesnt know where to go next on that, then how would i figure it out?

[triplefour]

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

http://www.ebay.com/itm/2-in-1-SMD-S...item4d1f2519fc

should i buy this??

[Caleb]

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

What Budm is saying is that if you kill the main ic you won't be able to buy a replacement ic, instead you will end up buying a new main board anyway. The 852 got OK reviews by several people just be aware the core heater for the hot air isn't very durable. Probably a good idea to have an extra on hand. I think you might be best served by having your friend reflow it for you. The hot air station will require some practice as well before you dig into a chip you want to save.

[budm]

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

Thanks Caleb for the explanation on what I am trying to say.

[Caleb]

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

No problem, trying to save your time for troubleshooting the difficult ones