Octigen M170E5 Monitor picture blinks, LED ON, hissing sound - HELP!

[CtrlAlterDead]

Octigen M170E5 Monitor picture blinks, LED ON, hissing sound - HELP!

Hello to All,

Its about monitor Octigen M170E5 failling to display picture repeatedly.

Very loud hissing sound heard from the back, continuous.

Took it apart and make some inside photos.

On the back of the Mboard that provides power is extra element, solderd by hands as seen on photos. Residues of solder also very near to this element.


Pic1: https://drive.google.com/open?id=0B6dT-dSe7oVOMjBBRUlVZUZWN2M

Pic2: https://drive.google.com/open?id=0B6dT-dSe7oVOeTBWM0RpaWoyN0U

Pic3: https://drive.google.com/open?id=0B6dT-dSe7oVOOWpGRFF4aFUyUzg


Any thought on this problem.

Thank you All in andvance

 

[ffg7]

1st picture bottom big board, bottom left canned capacitor in group of 4 right hand side needs to be replaced as domed when it is supposed to be flat topped.

 

[turkey3_scratch]

There are more capacitors in that image failing, too. There is one on the right you can tell is bulged up because of the way light is reflected off it; only reflected off 1.4 the portion of the top.

 

[ffg7]

the other caps appear to be alright or not bulged at the moment.

 

[CtrlAlterDead]

1st picture bottom big board, bottom left canned capacitor in group of 4 right hand side needs to be replaced as domed when it is supposed to be flat topped.

So just to make sure.

Pic 1:http://

Is it wise to replace all 4 capacitors, and which brand to use?

Greetings

Mithat

 

[ffg7]

the other 3 appear to be alright so just replace the bad cap. can use a different brand capacitor but try to use the same values such as 1000uf & 25v. take bad cap with you when getting new cap.

 

[Harrisonj11315]

hissing sound is transformer sort of sound, something is shorting somewhere, or yes a capacitor is going bad.

 

[CtrlAlterDead]

There are more capacitors in that image failing, too. There is one on the right you can tell is bulged up because of the way light is reflected off it; only reflected off 1.4 the portion of the top.

Hello Harrisonj11315

Thank your for your time. Right now I m doing replacement of this one, as mentioned by FFG7, as in pic.

Pic 1: http://

Mithat

 

[CtrlAlterDead]

Hello

Done! Problem was in failling capacitor as mentioned by ffg7.

Monitor works like a charm. No more hissing sound from background.

Using it as front display im my company. Full working hours )

Many thanks for Your help.

Pic 1: https://drive.google.com/open?id=0B6dT-dSe7oVOWWY3cXc4bktaUDg

Pic 2: https://drive.google.com/open?id=0B6dT-dSe7oVObUxXa0pNSUZ4cFE

 

[ffg7]

why do you have the cap standing so high?

 

[CtrlAlterDead]

why do you have the cap standing so high?

Hello

Want to make sure that last service item stands out, just afterward I bended it to the right.

 

[ffg7]

mount it like how the other caps are, thru the 2 holes in the circuit board.

 

[CtrlAlterDead]

mount it like how the other caps are, thru the 2 holes in the circuit board.

Just did that. Resoldered and repositioned.

 

[ffg7]

clip the leads trim to the solder side of the board, can use wire cutters or nail clippers. the way you had that cap standing on the board meant that the cap could come off by itself or prevent metal shield that covers the boards when mounted to back of screen from sitting properly.

 

[CtrlAlterDead]

clip the leads trim to the solder side of the board, can use wire cutters or nail clippers. the way you had that cap standing on the board meant that the cap could come off by itself or prevent metal shield that covers the boards when mounted to back of screen from sitting properly.

Its now as the others, well as cloes as, considering soldering.

This display is already in use from promotion on my front company's entrance, and the back of the panel is exposed right now for reason of explaining these kind of issues with my collegues.

Once again, thank for the lost time and effort.

 

[ffg7]

no problem. the only 1 to have lost time was you til you got that monitor fixed to be able to use it. I've done this multiple times including this Samsung 24" monitor I got from a customer & my 19" samsung Frankenstein monitor.

 

[CtrlAlterDead]

@ ffg7

Lucky you. Keep up with that. Looking forward exchanging DIY stuff in upcoming problems I bump in.

 

[ffg7]

been doing board work for about 30yrs, I've replaced components on monitors, motherboards, cards & psu's but only that 1 Frankenstein monitor.

 

[CtrlAlterDead]

been doing board work for about 30yrs, I've replaced components on monitors, motherboards, cards & psu's but only that 1 Frankenstein monitor.

Good, very good. Why is it Frankenstein? Coupled of something that is electricly dead, not supposed to be or...

 

[ffg7]

it is using parts from 2 different models of Samsung 19" monitors. original 19" was vga only with a bad video controller, the 2nd had a bad cap in the power board plus a bad scratch in the screen. used original 19" screen & power board connected to the 2nd 19" monitor's video controller that had dvi plus vga & the menu buttons board to make certain it all worked which it did. had to modify both the bezel & back cover of the original 19" monitor to accept the menu buttons board & video controller as the 2nd monitor casing would not take the original screen because of dimension problems. used that Frankenstein in dvi mode for about 5yrs til i fixed this 24" samsung that also has hdmi that is being used now.

 

[CtrlAlterDead]

it is using parts from 2 different models of Samsung 19" monitors. original 19" was vga only with a bad video controller, the 2nd had a bad cap in the power board plus a bad scratch in the screen. used original 19" screen & power board connected to the 2nd 19" monitor's video controller that had dvi plus vga & the menu buttons board to make certain it all worked which it did. had to modify both the bezel & back cover of the original 19" monitor to accept the menu buttons board & video controller as the 2nd monitor casing would not take the original screen because of dimension problems. used that Frankenstein in dvi mode for about 5yrs til i fixed this 24" samsung that also has hdmi that is being used now.

Well that is Frankenstein to a word. Great endeavour, creating ONE out of two partially damadeg monitors. Most of the ppl would have it trown away.

However, no resolution difference, now when the original display 1st one had to be connected to DVI/VGA ready video card??? (Samsung on Samsung)

 

[ffg7]

nope.

 

[CtrlAlterDead]

Hello ffg7

Once more about my Octigen monitor. It's working ok, but until now didn't noticed that after VGA cable is removed or PC goes to shut down, LED starts flashing as supposed, but monitor is not OFF, exacly lamps. It's like in this pic below.
Hiting Power button shuts down flashing LED but monitor still looks like that one in poc below. Have to remove power physicaly.

Pic: http://

Any thoughts?

Thnx

 

[ffg7]

if computer is turned off & monitor power led is also turned off but monitor screen is on then something else is bad. does the monitor power button connects to the power board or to the video controller?

 

[CtrlAlterDead]

if computer is turned off & monitor power led is also turned off but monitor screen is on then something else is bad. does the monitor power button connects to the power board or to the video controller?

Monitor power and other buttons board connects directly to video board trough that wider set of wires like in the pic bellow.

Pic1: http://