Samsung SyncMaster B2330 Black screen

[budm]

Re: Samsung SyncMaster B2330 Black screen

Pictures of bad lamps, bad wiring:
http://s807.photobucket.com/user/bud...?sort=3&page=1

[malexry]

Re: Samsung SyncMaster B2330 Black screen

I have a few pictures before the monitor went, they are not very good ones but none the less I will post them. also thanks for the speedy replies guys very much appreciated

[Lumberjack777]

Re: Samsung SyncMaster B2330 Black screen

Like budm says, it's very possibly bad wiring. I'd hold off buying that power/inverter board from eBay until you have checked this out. Otherwise you could have 2 good boards and no working lamps. You can use a paper towel tube to try and hear where the hissing sound is coming from. It may be inside by the lamps. (also in pure darkness with the back cover off, look for arcing) And don't run it much like bud says, or you could have a major burnout.

[budm]

Re: Samsung SyncMaster B2330 Black screen

"the upper right hand corner( when the monitor gets hot) it has a black triangle that grows as the monitor gets hotter." Can we see the pictures? It sounds more likely to be bad wiring at the end of the lamp. Do not keep running it like that since that can damage the transformer.

[malexry]

Re: Samsung SyncMaster B2330 Black screen

also another quick question will this work? it is a different monitor but looks very similar to mine. And its about the same price as the inverter. And its EASYER by 100%+ would this work? the display cable looks identical, as does the button cable. link is below:


http://www.ebay.com/itm/Samsung-Sync...77769664&rt=nc

[malexry]

Re: Samsung SyncMaster B2330 Black screen

if this little extra information helps their is another screen issue, the upper right hand corner( when the monitor gets hot) it has a black triangle that grows as the monitor gets hotter. when I game is usually when it is noticeable. But that does not bother me Im just saying that if it could help anyone, thank budm, I will look into the inverter transformer, because the hissing sound I doubt is the monitor making that sound and the 1/200 times the monitor works their is no hiss coming from it. So I hope it is the transformer! I will look into it this weekend or next! Any other info from anyone would be greatly appreciated!

[budm]

Re: Samsung SyncMaster B2330 Black screen

Hissing sound can be due to bad lamps wiring, bad high voltage winding on the inverter transformer.
You may have to remove the transformer to look at the underside and on the top to see if it has any arcing mark, checking the lamps wiring will be a lot more involve.

[malexry]

Re: Samsung SyncMaster B2330 Black screen

I have the same b2330 as you, and I have uploaded pictures of the circuit board. 2 days ago it went out randomly and when I turn on the monitor it makes a hissing sound and then shuts off after about 2 seconds. I have no blown capacitors and I do not really know much about circuitry and such but if anyone can help me with this problem that would be great! also one more thing to throw everyone off, like 1 out of 200 tries the monitor will actualy stay on! the pixels always are on it is the black light that stays on 1/200 times. why I have no idea! but if I turn it on and off for like 30 mins the monitor will work completely fine until I turn it off, it goes to sleep, ect. so if anyone can figure this one out id be happy! also the monitor is significantly dimmer than my other monitors and that might have something to do with it as well.

ps: when I say the monitor "shuts off" or "goes out" its the back light, I did the flashlight test and I saw the image on the monitor BEARLY! but I did see them.

also sorry for bump, I just really need this solved

[VaNDAL_UK]

Re: Samsung SyncMaster B2330 Black screen

Any news on the out come?

I'm picking up one of these monitors on Monday repoted as no power issue.

[tama4tama]

Re: Samsung SyncMaster B2330 Black screen

Thank you all for your help to see that this monitor came back to life. As soon as I get part and fix it, I will let you known the out came.

Tama

[PlainBill]

Re: Samsung SyncMaster B2330 Black screen

I have done the measuring all over again and it seem that the IC is bad with according to the datasheet , this morning It read 5.9v on the pin 3 and pin 6 was generating high voltage.

Tama

It's probably a translation problem, but there is one slight error in that statement. The IC receives high voltage on pin 6, and is supposed to reduce it to about 12-20 volts for Vcc.

The failure of Vcc to rise to the start voltage is is a common failure mode, replace the FSGM0565R. You may have to use the earlier version, it can be found on eBay as DM0565R

PlainBill

[tama4tama]

Re: Samsung SyncMaster B2330 Black screen

I have done the measuring all over again and it seem that the IC is bad with according to the datasheet , this morning It read 5.9v on the pin 3 and pin 6 was generating high voltage.

Tama

[retiredcaps]

Re: Samsung SyncMaster B2330 Black screen

These are voltages I got on pins 3, was 238v and 6, and was 230v. Is that correct?

If pin 3 was really 238V DC, that would be one cripsy chip.

Pin 3 maximum is 26V.

[PlainBill]

Re: Samsung SyncMaster B2330 Black screen

These are voltages I got on pins 3, was 238v and 6, and was 230v. Is that correct?

Tama

Those numbers don't look right. Verify the voltage on pin 3. I've attached a picture.

PlainBill

[tama4tama]

Re: Samsung SyncMaster B2330 Black screen

These are voltages I got on pins 3, was 238v and 6, and was 230v. Is that correct?

Tama

[PlainBill]

Re: Samsung SyncMaster B2330 Black screen

To add a little bit to retiredcaps post, using pin 2 of the IC as ground, CAREFULLY measure the voltages on pins 3 and 6. Pin 3 is Vcc, pin 6 is the source for the startup voltage. the pins are numbered 1 - 6 from left to right,

PlainBill

[tama4tama]

Re: Samsung SyncMaster B2330 Black screen

Thank you, PlainBill, Selldoor and Retiredcaps, I am sending the picture of the IC

tama

[retiredcaps]

Re: Samsung SyncMaster B2330 Black screen

Now for some real technical help.

Pin 3 is Vcc. Pin 2 is GND.

According to the datasheet, when Vcc reaches 12V DC, it will start. What DC voltage reading do you get on pin 3 (with pin 2 for ground)?

[retiredcaps]

Re: Samsung SyncMaster B2330 Black screen

Think it is this? its a zero not an oh

This post below doesn't help out the OP, but speaking of mixing up "0" and "O" ...

https://www.badcaps.net/forum/showthread.php?p=213475

[selldoor]

Re: Samsung SyncMaster B2330 Black screen

Think it is this? its a zero not an oh

http://www.fairchildsemi.com/pf/FS/FSGM0565R.html