Re: Hannspree HF257 2-3 seconds black
Mine pretty much did the same thing and after chasing parts and replacing things, I finally gave in and busted open the LCD an turned out to be 2 bad ccfl tubes on the bottom of the monitor. I ordered 4 new ones from lcdparts and put them in myself but I can tell you, its not an easy job and them tubes are tiny! So unless your confident you can change them yourself, you would be better off converting them to LED or buying a new monitor all together cause it would cost more to pay a shop to change them then the cost of a new LED monitor now days....
Hippie459MN
Member
Last Activity: 09-25-2015, 08:34 AM
Joined: 01-08-2013
Location: St Francis, MN
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Re: Hannspree HF257 2-3 seconds black
Just great! Got the bulbs fixed, put it somewhat back together and when putting it back together the metal frame holding the LCD panel in seemed to be a little tight but I didnt think anything of it and took it and fired it up and it worked beautiful for about an hour with no problems so I decided to put it back in the case and snapped everything back together and the frame seemed a tiny bit tough to snap together but seeing its tough to take apart I just figured that was that and put it on the desk only to now see these wonderful lines in the...Leave a comment:
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Re: Hannspree HF257 2-3 seconds black
Well, got it apart and actually was very simple to get them out but as you can see on the bottom 2 bulbs...
Yes, the are both broke on the one end with the wires showing.
I didnt take any pictures of the top 2 but the one has some blacking on both ends but not near this bad and the other one looks fine. I will see how changing out these 2 go and then see how ambitious I feel about doing the other two....Leave a comment:
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Re: Hannspree HF257 2-3 seconds black
Well, got my replacment lamps today. That was fast considering I ordered them Wed afternoon and Thursday morning they were shipped out and I paid for the cheapest shipping from USPS.
I will tackle this later today or tonight. Depends if this kiddo of mine takes a nap today or not. Im not going to attempt it with the chance of my 3 1/2 year old distracting me. He did good watching me recap the inverter board but thats nothing I havent done before.
I will also try to either get video or plenty of pictures but thinking...Leave a comment:
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Re: Hannspree HF257 2-3 seconds black
I know that now. lol I was originally going off what this person said that took a look at the monitor for me when it first started acting up and I didnt have any test lamps at all. I do now though and after doing a lot of reading and working with this, I now now my way around a monitor much better now and will be doing any future testing/repairs myself from the beginning. This has certainly been a great learning experience and even more so once I dig in to getting the lamps out, repaired, and back in.
I cant wait. Sitting here using...Leave a comment:
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Re: Hannspree HF257 2-3 seconds black
Order a complete retube kit from ccflwarehouse for $30 on sale a few days ago. Hopefully I will get them tomorrow (Saturday) and I can get to work on this.
I have never messed with a monitor before and an acquaintance said he had repaired many of them and had a tester for testing caps inline and first told me things were bad and told me to buy this one power supply/inverer board on ebay so I did, coming from china, waited 5 weeks, got it only to have it be bad (Transformer on PS side), so I did a search leading me here and learning...Leave a comment:
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Re: Hannspree HF257 2-3 seconds black
Well, I have officially figured it the problem and was really hoping this wasnt it but it is. I hooked up a good pair of ccfl tubes to the board and its been on 100% brightness for about a half hour now. Good news it the power supply/inverter board has all brand new FM series caps on it. I can solder really good and change caps and other stuff like that but this taking the display apart has me a bit nervous but im going to give it a go. Dont really have anything to loose.
Finding anything about taking a ccfl tube...Leave a comment:
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Re: Hannspree HF257 2-3 seconds black
Well, further inspection I can not just slide the CCFL tubes out so I am going to getting some tubes from a friend to hook up and see if if hooking up a good tube works and if so, then I will know if it is a tube of not. Really leaning that way. I did re-cap the entire board and I dont know if the new caps cause this but now I cant turn the brightness up past 11 or it will go out as where before I swapped the caps I could turn it up to about 17 without it going black. I did triple check all of my solder connections and they are all seem to be...Leave a comment:
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Re: Hannspree HF257 2-3 seconds black
Well, after further inspection, looks like changing the CCFL tubes will be a piece of cake if I have too. Looks like I just have to pull the metal frame off enough on one end and they slide right out the side. No need to take it to far apart. I hope....
And it looks like ccflwarehouse.com has a relamp kit on sale for $30 right now.
I do wonder if it isnt a CCFL tube though cause I did have the flickering in the bottom left side of the screen and it was flickering for a good 10 seconds before I shut it off and turned...Last edited by Hippie459MN; 01-09-2013, 06:59 PM.Leave a comment:
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Re: Hannspree HF257 2-3 seconds black
I think I am going to just re-cap it and see what happens. Time to see if I can track down all the caps locally here.Leave a comment:
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Re: Hannspree HF257 2-3 seconds black
Yes, Sorry about that. I was just using it for a reference as my cheap camera was not getting a good picture at all. I grabbed my mothers camera and got a better picture of my actual board....Leave a comment:
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Re: Hannspree HF257 2-3 seconds black
S1>S2 = 997 consistent
S3>S4 = between 1004 and 1007
S3>S4 will not fluctuate while being tested but if I test once, wait a min or so, test again it will give a different reading. To me even the 997 sounds kind of high but I could be wrong for those inverter transformers as I do not have any kind of data sheet or any kind of info on them.Leave a comment:
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Re: Hannspree HF257 2-3 seconds black
I put the original board back in today to try something and I was able to keep the screen lit up with the brightness down to 20 but as soon as I removed any number of the CCFL connectors from the board, 2 seconds and black. even with the brightness down to about 10. I didnt go any lower then that. I plug all 4 plugs back in and it stays lit up again so long as I dont bring the brightness up to much. So where to go from there? Could this rule out a CCFL tube? I am not going to let this monitor get the best of me just yet.Leave a comment:
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Hannspree HF257 2-3 seconds black
I have a Hannspree HF257 (25") and about a month ago had the bottom left side of the screen start doing a weird flickering and turning the monitor off and on seemed to fix it only to to it again the next day an turning it off and back on fixed it again. A few days later after not having any issues at all the screen just went black all together and turning it off then back on it would light up for about 2-5 seconds then black again so I brought it to a friends that said he would test some items and said he had an ESR tester for the caps. Later that day he said that I had some bad caps and... -
Re: New Members - please post your introductions here
Hello, Was trying to look up some info on a monitor and came across the site. Lots of very helpful info here.
Oh yeah, from Minnesota USA here
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