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Thanks again for the responses. Symptoms upon turning it on were no reaction but the rapidly blinking led as well.
Thanks for yor effort helping me. Any idea where else to look?
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I have Samsung BF and have problem with backlight. They looked as good as new. Power light is on. Ok thanks all for the feedback. Okay So I am a newbie. I datssheet done some testing and I am in a cross roads as to what I should do next. Where else to look? What part did you change? It is not uncommon for manufacturers to make changes on their boards. Can you read a number on the 16 pin back light controller? Here’s the BOM from mouser. Datasheft, looks like Last Chance Bit3195 the Backlights become the Main suspects,so I would resolder the Inverter transformers,and all other joints between the secondary and the Lamp sockets,eg the small Blue Caps etc etc.
Attached are pictures from after the 3 caps were replaced. Well my picture upload Failed.: Others mentioned the fuse being problematic so I was looking for it to test it. Bit3195y, but measure the resistance of the secondaries of both of the Inverter transformers, they should be very very similar measurements. Well, I’m no expert on electronics.
Anyone have any ideas? Originally Posted by Logicsays Post The image is viewable with a flash light. I went to an electronics shop and the guy looked at the power board and got me some new caps to replace the 3 that were bulging. Originally Posted by jetadm Post As for the backlight, on some of these boards, a fuse F was used for the inverter section. Originally Posted by gypsy Post That fixed it!
Any help would be appreciated and I will bih3195g some pictures of the boards. Bad caps are still plaguing things inI have the same Samsung b, same problem I am unable to find a data sheet on the controller; if a data sheet datasheeet be located it should be very easy. Originally Posted by nesmrten Post What part datashwet you change? I replaced all caps and picofuse but still no backlight.
BITG Datasheet PDF – Inverter Controller – Bitek
Your board could have unique characteristics not shown in someone else’s photo like a charred resistor or suspicious looking transistor.
I did the whole power on and check with a flash light. I figured out what I didn’t do change three more of the caps and it’s up and running like a new monitor once again. However now the LCD works but the backlight still does not. I’m going to check it out and see if its tests good. I didn’t check that they exactly matched the old ones.
I see the image so something is working right. I have a samsung bbit3195g. Problem is that backlights arent working at all. I hope to get this fixxed nothing like a free 19″ monitor. Check to see if it’s open. I will check again for the fuse, I tried to look in that area but could not see the code f, however that section had darasheet lot of glue on it, so I’ll look closer.
Originally Posted by alexanna Post I am unable to find a data sheet on the controller; if a data sheet could be located it should be very easy. I had a similar problem with my Samsung B as well. As for the backlight, on some of these boards, a fuse F was used for the inverter section.
Can we get clear and focused picture of YOUR boards? Here are pictures of my board. I get the rapid blinking power LED no button functions. Bright as daylight and stable too.
The backlights come on and the bit3195 is white.
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Did they really think he would give them the entire formula??? Page bi3t195g of 4. Thanks again badcaps forum! I still will take some pics if I ever get some time. With the advice of gdement I replaced the bad caps of my Samsung b and it now works flawlessly!