help with Referesh Rate please

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uksathees · #1 Post by **uksathees** » Fri Nov 26, 2004 1:03 am

hi i have a T42P 2373KTU model with a ATI firegl T2 graphics, it only gives me a max referesh rate of 50Hz, regadless of the resoulation set, i currently set the resoulation at 1400x1050. even though on the ati setting i specified 60Hz, it stick to 50Hz, is there somethink wrong with the LCD.

please someone help.

Thank you.

uksathees · #2 Post by **uksathees** » Fri Nov 26, 2004 9:29 am

i frogot to mention, my lcd is a 14.1 inch

uksathees · #3 Post by **uksathees** » Fri Nov 26, 2004 9:31 am

ohh and please help me ASAP, the reason is bought my laptop from ebay, even though its brand new, but i need to get in touch with seller if there is any problem with lcd to get it replaced.

thank you for your help, this is my first ibm laptop, so i am bit lost with spec as well.

Ghostrider · #4 Post by **Ghostrider** » Fri Nov 26, 2004 10:38 am

I can't help you before my notebook arrives (that should be next week)....
But I am sure that there are other members who can help you.

Do you have any problems with the frequency of 50Hz?

Plinkerton · #5 Post by **Plinkerton** » Fri Nov 26, 2004 2:19 pm

My 14 inch 2378-FVU SXGA+ has always been set at 60. I've never changed it or anything, and I think the only option I get is for 60.

RCube · #6 Post by **RCube** » Fri Nov 26, 2004 4:29 pm

I have 1400x1050 screen too and 50 is the default refresh rate.

gcchatel · #7 Post by **gcchatel** » Fri Nov 26, 2004 4:37 pm

Hey everyone, refresh rates are for CRT monitors. This means how many times the photons are hit by the electron gun in one second. LCD displays use a different technology. The image stays until it is replaced. The CRT's photons fade if they are not hit again. The refresh rate would have to do with you hooking up your thinkpad to an external CRT monitor. LCDs have a set refresh rate and that can't be changed. Hope this helps.

Gael

uksathees · #8 Post by **uksathees** » Sat Nov 27, 2004 2:52 am

gcchatel wrote:Hey everyone, refresh rates are for CRT monitors. This means how many times the photons are hit by the electron gun in one second. LCD displays use a different technology. The image stays until it is replaced. The CRT's photons fade if they are not hit again. The refresh rate would have to do with you hooking up your thinkpad to an external CRT monitor. LCDs have a set refresh rate and that can't be changed. Hope this helps.

Gael

cool thanks, is wired i tought the lcd's would at least support 60hz referesh rate, my fujitsu-siemens has 60hz as max, i dont understand why the ibm ones only have a max of 50hz for lcd's.

Ghostrider · #9 Post by **Ghostrider** » Sat Nov 27, 2004 8:14 am

gcchatel wrote:Hey everyone, refresh rates are for CRT monitors. This means how many times the photons are hit by the electron gun in one second. LCD displays use a different technology. The image stays until it is replaced. The CRT's photons fade if they are not hit again. The refresh rate would have to do with you hooking up your thinkpad to an external CRT monitor. LCDs have a set refresh rate and that can't be changed. Hope this helps.

Gael

Well, there are many LCDs that can do more than 50 or 60Hz. (like the IBM T860). Yes, LCDs word differenct than CRTs - they display just the "changes" of the image. But with 50Hz instead of 60Hz they can just update 50 times a second compared to 60times a second at 60Hz.... For most apps this is not important. For Videos or games it may be a little low.

We have several TFTs in our company that flicker and/or produce glare areas that are moving from top to bottom over the screen IF the refreshrate is set too low.

As long as the screen looks good (=the image quality is perfect) the refreshrate isn't important for LCDs.

help with Referesh Rate please

help with Referesh Rate please

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