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Unfortunately, if the manufacturer states that the max RAM supported is 1GB, that's going to be all you're going to be able to install - unless you replace the motherboard. This can be a considerable expense.
One last thing you could do is go to Crucial - there, you can run a scan on your computer to find out what memory options you have. I would be very surprised to learn they differ from what Compaq is telling you (unless the motherboard was replaced by someone already).
I went over the specs of the TV.
The max input for the VGA is 1360x768 at 60Hz. Anything higher will make the TV go bonkers.
I would try to get the resolution at 1360x768, then change the frequency to 60Hz.
I had a similar problem with this monitor, mine was dim all the time to the point you cant use it, but the MENU icon was bright as new... also if cable was unplugged the box would float around as normal.... anyway I fixed it by taking it all apart and pushing in the socketed chip.. it clicked like it moved, I also pushed on the variable resistors on the power supply... now it works!!! First time since it quite working long time ago
Hi Sarah, You may want to try lowering the resolution of your computer down first before connecting the 42PX5D. Since everything seems to be working except when you get to the desktop then your PC might be set to a resultion that's too high for the LG (am not 100% sure, but I think that LG's max res is 1024 X 768). Try to adjust your PC's resolution while still connected to a regular monitor, right click on any free/clear part of your desktop and click properties. Display Properties window will pop-up, click on Settings tab, adjust Screen resolution towards the left,trym lowest posiible, color quality, again lowest possible. Then hook it up to the LG. If desktop now displays in LG, do the same again but this time going up. Do it by increment and stop when LG screen goes blank. Press escape to go to setting prior to blank. Adjust color quality best setting acceptable to the LG. Good luck and hopes this work out for you. Regards.