red dots all over screen then no signal

Neil543

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Apr 27, 2014
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I have connected my pc with a 22" samsung lcd tv through hdmi . Whenver I start my pc there are red dots all over screen for sometime and then it converts to "no signal". I don't think there ia problem with the cable .Please help
Cpu specs:
AMD Anthlon quad core processor(3.8ghz)
Zoyac geforce210 1GB DDR3 graphics card
 

tmt69

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Apr 23, 2011
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Red dots often signify connection error, the best thing you can do for now is to try a new cable, or try a DVI / VGA connection to make sure there are no hardware problems in either the graphics card or the monitor.

//edit

Sometimes it is just the by-product of a loose connection, make sure both ends of the HDMI are secure in their ports as well.
 

Neil543

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Apr 27, 2014
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The hdmi cable works fine with my Lg tv connected to pc, but it does not has as good picture quality as the samsung one. It used to work fine with my samsung tv too some time ago,don't know what has caused it. I have a already bought a new cable to check and also ensured secure connections.
 

tmt69

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Are there any other ways to connect to that specific TV, (Samsung)?

A lot of TV's have an HDMI mode, and then a COMPUTER mode, like a VGA mode.

Honestly, some TV's aren't made for computers to run them in HDMI mode, but that probably wouldn't be causing the problem.

I used to use a mini-hdmi to hdmi converter, the converter was really loose and had a bad connection, I would get red/pink dots and lines and sometimes complete disconnections between the computer and the monitor. Switching to DVI solved my problem, but you may have to consider other alternatives.
 

tmt69

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Ok, obviously VGA is lower quality (sometimes not in the case of TV's), but you need a high-quality fix. The last thing you could try is to buy a DVI MALE to HDMI FEMALE coverter, then plug the hdmi cable to the TV. This is assuming the problem lies with the graphics card, if the HDMI port in the TV is bad, you may not be able to fix it.

Here's the idea, might work, might not.

http://www.amazon.com/Importer520-Plated-Female-DVI-D-Adapter/dp/B0035B4LJM/ref=pd_bxgy_e_img_y
 

tmt69

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If you're having no problems using VGA, then I wouldn't think so. Regardless, you can download a free (safe) program called CPUID HWmonitor that will show you all the temperatures that are monitored by your system.

In the case (pun intended) that your system is dusty and old inside, maybe it hasn't been opened in years, you really should think about cleaning it out with some compressed air, or even sending it in to a local computer repair store for maintenance.

You can scroll down to your graphics card and check the temperatures, then compare them with averages for your card (using google).

If you bought the computer from a big company (Dell for example), you may want to check the status of your warranty before preforming the next suggestion.


Another thing you could do to make sure your graphics card is running safely would be to pop open your PC and check the fans and chassis (if any) for dust accumulation. As you probably know, a build-up of dust can cause core components of a computer to overheat and function improperly. A graphics card that is functioning improperly may show anomalies on the screen, such as pink lines or distortions.

If you were having PC crashes from this problem, windows often will tell you that there was a problem with your graphics card when you boot back up. If it didn't say that, then the problem is more likely to be a connection based issue.

//other notes

I looked up your card online, it's pretty old. I've seen cards like yours that have been exposed to high temperatures for long periods of time, the boards will literally warp on them. I've also seen cards stop functioning completely from heat damage too.

//summary

- try to reproduce the problem with a DVI to HDMI conversion

- check temperatures with software

- check the inside of the computer (or have someone with experience), look for signs of dust and heat damage.

- consider replacing or upgrading your graphics card
 

Neil543

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Apr 27, 2014
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I opened up my cpu unplugged the graphic card and cleaned it with a brush,my pc started working fine after that.But the next when I started my pc the same priblem occured again .