Hi just received a hp f2105 from my son. It powers up with full screen but the desktop is showing vertical lines from top to bottom where there is an icon even the mouse. When I move the mouse it is very slow re-acting and leaves a tail? The faster I move it the longer the tail? All action on the screen is very slow? Can someone tell me what would cause this.
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Re: hp f2105 slow screen
Try a different monitor so you know it isn't a video card problem.
If it was only lines I'd say the monitor but with those other things going on you should make sure it's not the card.Mann-Made Global Warming.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
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You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Re: hp f2105 slow screen
Thanks PCBONEZ for your responseOriginally posted by PCBONEZ
I tried it with a laptop and the screen on the laptop is fine but the monitor still shows the symptoms. What ever is causing the delay in the screen? Could it be a transistor problem? Some other symptoms; I cannot make any adjustments in the menu. When I push the OSM button, the menu appears on the screen then fades away. If I open a word doc the screen looks normal but when I start typing the movements on the screen are delayed. (the letters sort of fade in) On a web page with a scroll bar the page looks perfectly normal but I cannot read the scrolling bar?? Hope this does not confuse things but helps to identify the problem. It certainly appears to be the speed at which the monitor can process the commands from the cpu and I read that transistors have been used to improve the speed of lcd monitors?? Someone with more knowledge than I might explain this.Comment
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Re: hp f2105 slow screen
I think what is going on is the refresh rate has slowed down.
That's what updates the screen when something changes.
The cause could be a number of things.
Bad Caps, bad soldering, bad transistor or IC chip.
Even a corrupt firmware or just a loose connector.
I'm not a guru when it comes to video.
I'm just trying to help some until one of those happens along.
Off the top of my head davmax is very good at this sort of thing.
Look him up with user search and send him a PM. See if he has time to help.
In the mean time it's obviously inside the screen.
I suggest disassembly and inspection for obvious problems.
.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Comment
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Re: hp f2105 slow screen
Thanks I checked for loose connections but didn't find any The caps look good but I know that dosen't mean much. Where can I download firmware for this model? I disassembled the thing but didn't see anything obvious. I was hoping that someone like davmax would drop by sooner or later.Originally posted by PCBONEZComment
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Re: hp f2105 slow screen
Could this problem be caused by the video board? Looking at the caps on that board they all look good but 14 of them are Lelon caps. known bad. 3 are jamison and 2 elite!!Originally posted by PCBONEZComment
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Re: hp f2105 slow screen
I have had bad BAD experiences with Elite in LCD's.
Other people have similar complaints about about the other two. (Especially Lelon)
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There is a fair chance just replacing those caps will fix it.
It's not for sure of course. Just a reasonable change.
.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
-
Comment
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Re: hp f2105 slow screen
Thanks pcbonez I guess this is where I will start, if I can find some replacements nothing to lose.Originally posted by PCBONEZComment
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Re: hp f2105 slow screen
If you are in the US try digikey.comMann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
-
Comment
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Re: hp f2105 slow screen
Thanks ordered them off ebay last eveningOriginally posted by PCBONEZComment
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Re: hp f2105 slow screen
I am having a problem finding a 220uf @35v locally what is a good substitute? Is it required to use the same values when replacing or is there a tolerence level?Originally posted by PCBONEZComment
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Re: hp f2105 slow screen
Finally received the caps off ebay and replaced the 14 on the video board but the problem with the refresh rate still exist. I can however access the OSM which I could not do before.Comment
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Re: hp f2105 slow screen
I don't know what grade of caps you are working with but 220uF @50v shouldn't be hard to find and will work fine if they'll physically fit.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
-
Comment
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Re: hp f2105 slow screen
Thanks PCBONEZ I have read info in some of your previous post that suggest that and I actually used a 1000uf at 50 volts? But as indicated the caps was not the problem so I am now looking at the transistors and checking the boards for loose connections and poor soldering.Originally posted by PCBONEZComment
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Re: hp f2105 slow screen
220uf -> 1000uF is too big a jump.
Without knowing the circuit I would stick to the original value.
In a pinch maybe a 270uF. (Next standard size up I think.)Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
-
Comment
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Re: hp f2105 slow screen
Thanks again PCBONEZ so what would be a good substitute for 680uf @ 25V? another on I can;t find. I am buying from this ebay store http://stores.ebay.ca/addison-USAOriginally posted by PCBONEZComment
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Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
-
Comment
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Re: hp f2105 slow screen
Thanks pal I will attempt to place an order.Originally posted by PCBONEZComment
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Re: hp f2105 slow screen
My HP f2105 has the same problem. The screen has a massive delay and there are vertical lines on the screen. The menu still works in mine though. It happened all of a sudden. If you figure out how to fix it, please let us know. Thanks.Comment
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Re: hp f2105 slow screen
I finally got back at this monitor. I have now replaced all the caps in two of the four boards (that were all elite caps) with no results. I did find a loose connection at the main plug connection (120v) and re soldered but did not make any difference. Not sure what to try next. here is a photo of the boards I think??. My first post with attachment??Attached FilesComment
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