Unit in question is LE40S86B. Originally normal Samsung issue of taking a long time to power on with relay clicks. When PSU checked 4 of the 6 1000uf capacitors had blown which I replaced with higher 16v versions low ESR. When I tried powering up tv with replaced capacitors the same fault existed clicking relay but not powering up. I am aware that sometimes Eprom ic803 underneath the power board fails after repeated attempted start ups with blown capacitors so I replaced that also. The problem is that I still have the problem of clicking relay and not powering up despite changing the components that are known to cause this issue. So either there is another problem with the power board BN44-00134a possibly in the inverter section or the fault lies in the main board. I would be interested in any comments or sugestions as which one would be the most likely. Many thanks in advance for any replies.Unit in question is LE40S86B.
Originally normal Samsung issue of taking a long time to power on with relay clicks. When PSU checked 4 of the 6 1000uf capacitors had blown which I replaced with higher 16v versions low ESR. When I tried powering up tv with replaced capacitors the same fault existed clicking relay but not powering up. I am aware that sometimes Eprom ic803 underneath the power board fails after repeated attempted start ups with blown capacitors so I replaced that also.
The problem is that I still have the problem of clicking relay and not powering up despite changing the components that are known to cause this issue.
So either there is another problem with the power board BN44-00134a possibly in the inverter section or the fault lies in the main board. I would be interested in any comments or sugestions as which one would be the most likely. Many thanks in advance for any replies.
Many thanks for your reply but I believe I know what the problem might be. There just happens to be an ic1803 underneath the power board and I changed that instead of the ic1803on the main board. Later on I will change the ic1803 on the main board and that should I think be the answer to my problems. Do you know whether the component ic1803 on psu board is likely to be the same component as the one marked the same on the main board? The one on psu board is marked A358E and if that is also a 24c256 I wont need to put original one back on.Many thanks for your reply but I believe I know what the problem might be. There just happens to be an ic1803 underneath the power board and I changed that instead of the ic1803on the main board. Later on I will change the ic1803 on the main board and that should I think be the answer to my problems. Do you know whether the component ic1803 on psu board is likely to be the same component as the one marked the same on the main board? The one on psu board is marked A358E and if that is also a 24c256 I wont need to put original one back on.
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About 3 til 5 years old is to short life, its still years the same problem in 80% in this case its not a good idea to replace power supply prints or other prints where bad capacitors are to find because its should again give you not more lifetime , what there must be happens is that someone in your Country will replace ALL electrolitic capacitors that have brands like JH x luxon lelon and much other korean made capacitors / some of then are bulged convex topped and or they have leakage , replace with good size fitting capacitors that are about 10-16 volt higher with the same capacity so the tolerance is bigger because Samsung is have a very good build up with good prints to replace components to do it yourself or for somebody else to do for you , A capacity measure tool to have is not easy because the most of them the sheap ones have not a (no-lie) measure technik and some of the capacitors are damaged (part that its get not on the right time its self healing capacity . Good Capacitors to replace are Jamicon , Nichicon , Frako Philips , Elna ,Nippon chemicon. Bc , Rubycon, Roederstein the youtube is a suggestion on model There are sometimes 3 watt green colored resistors with faultering endcaps in some models replace them with new resistors to prevent your components look good for brown spots on some components resoldering them a few Vishay resistors are good enough for replacement metalfilms in powersupply if the green ones are present (fuse-resistors ) are higher placed then the other resistors.. look some Samsung repairs on youtube.
Its going on now about for years with this Samsung capacitor challenge from about 2002 its a phenomenon in much more Brands of electronic products and computer mainboards.
Between 2 and 5 years are the most capacitors in Samsung deformed. Succes with the project.
Most of the time only secondary large electrolytic capacitors are being renewed althoug small E. capacitors in a primary circuit of an smps (around the switching driver IC) can also cause this kind of issue. Although you say you replaced them i still believen its a bad capacitor.
Most likely the lines are coming from a failing LCD panel tab connection. The capacitor problem and LCD tab problem are the most common problem for older Samsung LCD's
If this is an lcd tv check for capacitors on the power board that have domed tops. Replace these capacitors with the same value. microfarad mf and voltage v. make sure to notice the polarity and no not us non polarized capacitor. only use electrolytic capacitor .
Power supply board have dead capacitors.Know how to solders?Check these capacitors for puff up or burst open replaced these capacitors.Or buy and replaced the whole power supply board at Shopjimmy.com,Ebay.com.
Howdy,
It would be a lot cheaper if you just replace the two caps that have gone bad. Just get a cheap solder pencil from the store and about an inch of solder and you are in business.
The Power Supply Board is the center Board (towards left) after you remove the back off the TV. Remove Board from TV with the 6-7 screws. Replace capacitors CM852 & CM853; 2200ufd 25volts.
Unit in question is LE40S86B.
Originally normal Samsung issue of taking a long time to power on with relay clicks. When PSU checked 4 of the 6 1000uf capacitors had blown which I replaced with higher 16v versions low ESR. When I tried powering up tv with replaced capacitors the same fault existed clicking relay but not powering up. I am aware that sometimes Eprom ic803 underneath the power board fails after repeated attempted start ups with blown capacitors so I replaced that also.
The problem is that I still have the problem of clicking relay and not powering up despite changing the components that are known to cause this issue.
So either there is another problem with the power board BN44-00134a possibly in the inverter section or the fault lies in the main board. I would be interested in any comments or sugestions as which one would be the most likely. Many thanks in advance for any replies.
Many thanks for your reply but I believe I know what the problem might be. There just happens to be an ic1803 underneath the power board and I changed that instead of the ic1803on the main board. Later on I will change the ic1803 on the main board and that should I think be the answer to my problems. Do you know whether the component ic1803 on psu board is likely to be the same component as the one marked the same on the main board? The one on psu board is marked A358E and if that is also a 24c256 I wont need to put original one back on.
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