My screen stays blank after Resuming from standby on my PC. It appears that the longer I leave the PC off the more likely it will happen. But there are no hard rulesCan anybody help me find out how can I fix this.I did the basics DRIVERs, BIOS, XP SP3 update .

Hi mrfekson, - What happened before you encountered the issue?- Did you update the Video Card drivers as well and check? If no, do the same and check. Press any key on your keyboard or move your mouse. Either of this action will turn off power-save mode. Alternately, you can press the power button on your computer or laptop. Check if this will help to resume successfully.You may also boot into Safe Mode on your computer and perform Clean Boot to check which application is causing this issue.Place your computer in Clean Boot state to identify the application causing this issue.Putting your system in clean boot state helps in identifying if any third party applications or startup items are causing the issue. If yes, you may have to contact the program manufacturer for any updates or uninstall and re-install the program. Follow the steps given in the link below to do the same:How to configure Windows XP to start in a "clean boot" stateNote: After troubleshooting, make sure to put the computer to start as usual as mentioned here:To configure Windows to use a Normal startup stateAfter you used the clean boot to resolve your problem, you can follow these steps to configure Windows XP to start normally. a. Click Start, and then click Run.b. Type msconfig, and then click OK. The System Configuration Utility dialog box is displayed.c. Click the General tab, click Normal Startup - load all device drivers and services, and then click OK.d. When you are prompted, click Restart to restart the computer. Regards,Divya R – Microsoft Support.Visit our Microsoft Answers Feedback Forum and let us know what you think.

My apologies for late reply, (back from holiday :) I have tried what you said and it helped me to understand that the Motherboard is faulty. RegardsMrFekson

.... and thank you very much for your help.

Hello MrFekson, You're welcome! Do write to us if you have any other queries in future. Regards,Divya R – Microsoft Support.Visit our Microsoft Answers Feedback Forum and let us know what you think.