Samsung 930b LCD cold start problem (inverter?)
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Re: Samsung 930b LCD cold start problem (inverter?)
Im not very good in electronic to track it to the controller.
Not shure but i think writes something like BIT31956 FMF17 60511Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
I am unable to find a data sheet on the controller; if a data sheet could be located it should be very easy.Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!Comment
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For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Last edited by PlainBill; 06-12-2011, 07:05 AM.For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
this thread saved my monitor also, I would like to thank you for this nice explanation to a commen problem, I have never soldered before but I could easily do it because of this thread, thanks for keeping it alive!Last edited by DragonfisT; 07-21-2011, 08:21 PM.Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
I had a similar problem with my Samsung 930B as well. Before doing any work neither the lcd or the backlight was working. 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. I didn't check that they exactly matched the old ones.
After soldering them on though, I noticed that the voltage was not the same on the new ones (old caps 820 mcf/25V, new 820 mcf/16V). However now the LCD works but the backlight still does not. Anyone have any ideas? Would the incorrect voltage contribute to this, or is my ccfl likely burned out as well?
Attached are pictures from after the 3 caps were replaced. The new caps are the 3 green/gold ones.
http://s1112.photobucket.com/albums/...amsung%20930B/
Thanks for any assistance in advance.Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
I had a similar problem with my Samsung 930B as well. Before doing any work neither the lcd or the backlight was working. 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. I didn't check that they exactly matched the old ones.
After soldering them on though, I noticed that the voltage was not the same on the new ones (old caps 820 mcf/25V, new 820 mcf/16V). However now the LCD works but the backlight still does not. Anyone have any ideas? Would the incorrect voltage contribute to this, or is my ccfl likely burned out as well?
Attached are pictures from after the 3 caps were replaced. The new caps are the 3 green/gold ones.
http://s1112.photobucket.com/albums/...amsung%20930B/
Thanks for any assistance in advance.
Going down in voltage is always a bad idea. I figure that the guys who designed it didn't want to spend a dime more than necessary and the particular voltage was chosen for a reason.
Generally, results buying caps form a 'brick and mortar' store yields very poor results. In most cases the staff has no concept of the importance of using low ESR caps, and take more interest in collecting payment than filling the customers needs.
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
I had a similar problem with my Samsung 930B as well. Before doing any work neither the lcd or the backlight was working. 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. I didn't check that they exactly matched the old ones.
After soldering them on though, I noticed that the voltage was not the same on the new ones (old caps 820 mcf/25V, new 820 mcf/16V). However now the LCD works but the backlight still does not. Anyone have any ideas? Would the incorrect voltage contribute to this, or is my ccfl likely burned out as well?
Attached are pictures from after the 3 caps were replaced. The new caps are the 3 green/gold ones.
http://s1112.photobucket.com/albums/...amsung%20930B/
Thanks for any assistance in advance.Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
Exactly. Check that one, as it tends to go out often, at least in the units I've seen...There are 10 kind of people in this world: those that understand binary, and those who don't.- ASUS ROG Maximus IX Code
- Intel Core i5-7600K 3.8GHz
- 16gb GSKILL TridentZ RGB DDR4-3200
- 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
- Windows 10 Pro x64
- GeForce GT1050
2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job)
Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
Ok thanks all for the feedback. I knew the incorrect voltage caps were not a good idea, but I figured it was mostly for the reason that they would burn out very quickly as opposed to not working at all. If I can get this working, I will absolutely change them. I will check again for the fuse, I tried to look in that area but could not see the code f301, however that section had a lot of glue on it, so I'll look closer. Thanks again for the responses.Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
Got to repair a 930bf a few days ago. Symptoms upon turning it on were no reaction but the rapidly blinking led as well. Changing all caps on the power board, except the big one, fixed it. They looked as good as new. Has been working ever since. Thanks again badcaps forum!Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
Okay So I am a newbie. I have a samsung 930b. I get the rapid blinking power LED no button functions. I have done some testing and I am in a cross roads as to what I should do next. If I disconnect the video cable to the monitor I gain control of the buttons. The backlights come on and the screen is white. I know it's no suprise with the white but here is what has me dumbfounded when the cable for the screen is connected the I get just the blinking LED. Any help would be appreciated and I will get some pictures of the boards. Thank you for all the Help in Advance..Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
Okay so I got the pictures. I hope to get this fixxed nothing like a free 19" monitor. Well my picture upload Failed.Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
Well bright side is I am still mentally challanged. 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. Thank you every one for all the great knowledge on this thread and on this forum..Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
What part did you change? i have same problemplease help...
Regards from SloveniaComment
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For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Samsung 930b LCD cold start problem (inverter?)
I just wanted to post a huge THANK YOU to everyone who has posted on this forum. With the advice of gdement I replaced the bad caps of my Samsung 930b and it now works flawlessly! Here's the BOM from mouser.com. You guys rock!
X1
Mfr. #: UVY2W101MHD
Desc.: Aluminum Electrolytic Capacitors - Leaded 450volts 100uF 18x40 20% .5LS
X1
Mfr. #: EKY-250ELL470ME11D
Desc.: Aluminum Electrolytic Capacitors - Leaded 25volts 47uF 5X11
X1
Mfr. #: ESW477M025AH2AA
Desc.: Aluminum Electrolytic Capacitors - Leaded 25volts 470uF 20%
X2
Mfr. #: EKMG250ETD102MJ20S
Desc.: Aluminum Electrolytic Capacitors - Leaded 25volts 1000uF 10X20
X2
Mfr. #: EKZE160ETD102MJ20S
Desc.: Aluminum Electrolytic Capacitors - Leaded 16volts 1000uF 10X20
Total Cost was $11.82Comment
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