I-Inc IF281D Display Problem

[DIODE]

Re: I-Inc IF281D Display Problem

Thank you retired caps
The replacement power supply has a problem, +5v is not there, +5sb +12 and +24 are working OK, attached pic of PS, any suggestions would be helpful.

[jetadm123]

Re: I-Inc IF281D Display Problem

What we don't know at this point is whether the 5V output is derived from the 12V or 24V outputs. Or, if like most power supplies, the 5V output comes from a heatsinked diode pack. Suggest you trace the 5V output to see where/what it's connected to. If the 5V is from a diode pack, check it for shorts. If it's from the 12V or 24V, then check for a 5V voltage regulator circuit.

[borlosky]

Re: I-Inc IF281D Display Problem

Sorry for the long delay, but was finally able to get a chance to take the monitor apart and get some pictures of all the boards. please let me know if there's any other info you need

[borlosky]

Re: I-Inc IF281D Display Problem

anyone been able to take a look at this at all? I'd like to try to order whatever I need to try and fix this, thanks :-)

[selldoor]

Re: I-Inc IF281D Display Problem

i'm having similar issue with my iF281D, the power light comes on (blue) like normal, but no image/black screen. if i hold a flash light to the screen i see nothing still, sometimes i'm able to leave monitor on for a few hours, and then turn it off then back on quick, and will start working again, for a little while... i'm just not sure if it's the caps on the power supply, the input board or the backlight inverter... need to know which kit to order so i can replace the caps. any help would be appreciated. i've taken the monitor apart already and see no caps that looks bulged or anything to determine which one is causing the issue.

not looked yet -just bringing the story forward

[selldoor]

Re: I-Inc IF281D Display Problem

With it all connected up but before you switch it on I want you to get a hair dryer ( or hot air gun used very carefully) and gently heat the four caps in the bottom right corner of pic 18 They are c 30- c32 and another one further to the right near the BIG cap. When you have warmed them for a minute or two try pressing the power on switch.

[glen4cindy]

Re: I-Inc IF281D Display Problem

Hello. My display has been having a display problem for a few weeks now.

It stays "ON" all the time, but, "sleeps" on the computers schedule. Just after "waking up" whatever is on the screen starts to "shimmer" is all I can think of to describe it.

After about ten seconds, this effect goes away. This time, the effect was way worse, so I tried to power off the monitor in an effort to "reset" it. Just grasping at straws I guess.

Now, it appears "dead". No signs of life at all. No lights, no power, nothing.

Could this be a capacitor problem?

[borlosky]

Re: I-Inc IF281D Display Problem

With it all connected up but before you switch it on I want you to get a hair dryer ( or hot air gun used very carefully) and gently heat the four caps in the bottom right corner of pic 18 They are c 30- c32 and another one further to the right near the BIG cap. When you have warmed them for a minute or two try pressing the power on switch.

tried it, no go

[muc17]

Re: I-Inc IF281D Display Problem

Hi everyone!

I've got a Hanns.G HG281DJ with FSP217 4F02 power board. There was a beep and strange smell and after a while an explosion. I removed the power board and found the reason. I think the number next to the burst component is D8. My question is, is it worth it to repair it? What kind of component is it? I think the cable next to it is damaged, too, I'm attaching a snapshot.

Thanks for your help!

[Falcon99]

Re: I-Inc IF281D Display Problem

I also have a Hanns G HG281DJ with a FSP217-4F02 board which does not work.
The fault definitely is within the power supply, because with another PS, the monitor works.

I got the monitor with a burnt spot an the board:
- The fuse had jumped
- one of the FQPF 9N50C MOSFETs was cracked
- some circuits on the board were burnt
- some SMD resistors were defective (they read infinite ohms)

I fixed all I was able to recognize as defective and completely recapped the board.

The monitor still does not work. Now it manages to switch on the blue LED, but instantly the LED starts blinking; the screen stays black, and I do not think there is a backlight.

@ muc17: This is a glass passivated diode or "Glass passivated junction plastic rectifier". The diode in my board is still okay (at least it looks like it is) and it reads PG5408 pec8449. If you look it up in google you will find a datasheet (Panjit PG540x). I do not know but maybe a normal diode 1N5408 might be a replacement. I can't find any online shop selling the PG5408.

[giotrader]

Re: I-Inc IF281D Display Problem

I wanted to say thank you because I've been looking for this list of capacitors all over the place. It seems to be a secret for the sellers. So in order for google to find it: I will write this: LIST OF CAPACITORS FOR I-INC IF281D REV2 REV 2

[giotrader]

Re: I-Inc IF281D Display Problem

I need help please. I have a IF281D i-INC monitor.

The screen over the time has been taking longer and longer to open. It now takes 10 minutes and I have to keep open 24 hours a day.

Also I am getting display errors, sort of blury zones where there are edges.

I am attaching a picture of my power supply board. I already ordered the capacitors but before changing them I was wondering if I was going to waste my time.

The thing wrapped in yellow plastic doesn't seem to right, it's not wrapped up correctly could it be the problem?

[Lumberjack777]

Re: I-Inc IF281D Display Problem

I need help please. I have a IF281D i-INC monitor.

The screen over the time has been taking longer and longer to open. It now takes 10 minutes and I have to keep open 24 hours a day.

Also I am getting display errors, sort of blury zones where there are edges.

I am attaching a picture of my power supply board. I already ordered the capacitors but before changing them I was wondering if I was going to waste my time.

The thing wrapped in yellow plastic doesn't seem to right, it's not wrapped up correctly could it be the problem?

I believe that model is very similar to the Hanns-G HG281D. May be a clone even. If so, it sounds more like the main board. You might be "wasting time" by changing capacitors on the power board. Especially if that is a kit with inferior capacitors.

Does your main board look like the one I have attached? If so you need to replace the 2 caps I circled in red.

Also, are you skilled at soldering? Those 2 caps are through hole and can be a little more difficult to replace. Just let us know the answers to my 2 questions, and we can guide you in the right direction.

[giotrader]

Re: I-Inc IF281D Display Problem

will undo the main board tonight and :

I will check if it's the same you posted, if so, I hope I have the caps if so, i will change them anyway I will come back here with details and pics.

No I am not good at soldering, I just suck at it, same thing for plumbing soldering ahaha always a hard time, even with the grease but anyhow I will have this monitor back on the track because I love it.

[Lumberjack777]

Re: I-Inc IF281D Display Problem

OK. On through hole soldering you have solder on the bottom and inside of the metal tube. So when desoldering you have to get the solder on bottom and inside the tube, to have a clear hole. Some guys use a dental pick to clear the hole.

What I do is add a little solder to the solder joint. And to the tip of the iron. That creates good heat transfer to be able to pull out the leads of the old cap. Back and forth (between joints) until you wiggle the old cap out.

Now you might have a hole that is filled with solder. I will add solder to make it mound a little. Now place a fresh piece of solder wick over the mound. Make sure the iron is hot (40W or more). Add a little solder to the iron tip and press down on the wick. If you heat it all in one motion, it will start a vacuuming action that sucks the melted solder right out of the hole.

It's kind of funny that you actually need to add solder; in order to remove solder. But that's what causes the strong heat transfer that you need to melt all of the solder.

Here's a youtube video that explains it. https://www.youtube.com/watch?v=Z38WsZFmq8E

Make sure that you put the caps in the right direction. And you should be good to go.

[giotrader]

Re: I-Inc IF281D Display Problem

That's exactly same as my mainboad. Removing the 2 caps you circled.

[giotrader]

Re: I-Inc IF281D Display Problem

Thanks for the tip, I just realize that I don't have those 2 caps, I need 2X 16V 100uf

I will try to find them on internet

[giotrader]

Re: I-Inc IF281D Display Problem

Success! I changed the 2 caps you've told me and I have a perfectly working monitor! This is just amazing! Now what is the next part that will let me down? Anyway I would be back Thanks so much again for the help LUMBERJACK777 !!!!!!

[Lumberjack777]

Re: I-Inc IF281D Display Problem

The next part that could possibly give out would be the power supply.
But your's is different from the ones I know to go bad. It might just last.
My Grandpa used to say .... "If it ain't broke, don't fix it!"

Thanks for the feedback.

[giotrader]

Re: I-Inc IF281D Display Problem

Hi friends... Here I am 7 months later with a new problem. It is simple to explain though.

Same old screen, still doing a great job after I've fixed it back in Sep 14.

My screen flickers on any electrical variation in my house. Example: Right now I have a piece of ham cooking on the stove top in the kitchen. It's an electronic stove so whenever it turns ON my screen goes black for 1 second while I am typing!

If the fridge starts its compressor, same thing... Screen goes black for 1 second. Also after a good while in sleep mode (2-3hours), I have to crash restart the PC.

Now which caps should I change ? Thanks!