20 Most Recent HP Pavilion a1520n PC Desktop Questions & Answers

There are no schematics for desktop computers. If you mean mother board layout and manual then check here http://h10025.www1.hp.com/ewfrf/wc/manualCategory?cc=us&lc=en&product=3184139

It is the box that the mains power lead plugs into.

start here http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?cc=us&dlc=en&lc=en&product=3184139&and choose your operating system and hit next, then scroll down to choose your audio driver. Download driver and installif you choose xp, look under drivers original 6, and find Drivers for the Realtek High Definition audio solutions, download and run the program to install

I always start with the power supply. Your power supply may not be producing all the power your motherboard is requesting, even though the light on the back is on. If you dont have a power supply tester, then you can try removing your power supply and trying a known working supply in it, making sure you have the right connectors on it for your motherboard.. I looked at a pic of your motherboard Asus A8n-vm and I dont see an orange (or any) button to push. Was that to reset your bios? If so, unplug the system from the wall, and carefully remove the battery from the motherboard. While it is out, push the power button on the front of the computer a few times. The computer wont start up, as you have it unplugged, its just to drain the motherboard of power to reset the bios. Then reinstall the battery, making sure it goes in the same as it came out (- is usually down and + is up). This should reset the bios info to the factory settings.But I still think it is a faulty power supply.

the noise was most likely from the power supply, once turned off it does not have enough juice to power all components of unit up

If you have your settings in the bios to boot from your optical drive you should be able to insert your windows 7 disc and choose to boot from it then just follow instructions.

Open the cpu cabinet cover.Clean dust from all parts. Pull cmos cell from motherboard. Reconnect RAM memory.Try with another RAM if you have. Reconnect processor and it's fan. Make sure motherboard is not ground with cabinet cover. Remove pci card if any if you use vga card then reconnect it. Pull cmos cell from motherboard for 10 minutes then put back it into it's original position. Then check. Let me know if you need further assistance. Thanks for using FixYa.

there's two possibilities
either the drive the disk is in is going out
or there's something wrong with the disk

I've got 2 hp pavilion desktop computers & I've had the drive go out & cd or dvd also

pick one
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007661%20600011385&IsNodeId=1&name=MFC%20%2f%20All-In-One

http://download.cnet.com/Everest-Ultimate-Edition/3000-2086_4-10499291.html,use this link to download everest which will help you to find(identify) missing drivers...

Double click the SM Bus Controller, go to the Details tab, change the Property drop down box to Hardware IDs, copy the last hardware ID in the list, and then go to http://devid.info, paste in the hardware ID, and then it will bring up a selection of downloadable drivers for that hardware ID. Good luck.

If you have any problems, paste your hardware ID in this thread.

Alternatively go to your motherboard manufacturer website, you might find something there.

Restart the computer. As it's booting up, keep tapping the f8 key over and over until the boot screen appears. From there, you can select from the menu for it to boot into safe mode.

Bad Power supply. Look on the side of your current power supply and find the wattage rating, and buy one of the same rating or higher. Some place like newegg.

It sounds a little strange because it should do as the disk tells it.
Check the BIOS is set for DVD/CD Rom drive as 1st boot device.
Insert System disk into drive. Re boot the computer and follow the on screen prompts.
Vista will have no problems because it will check the OS that is installed, notice the date stamp is older than Vista and install a new OS on the drive. XP however may have a problem. If you have SP2 or SP3 installed, your XP system disk is older and will not be allowed to load without prompting.
Hope that helps.

boot in safe mode and check your drivers by right clicking the my computer icon and go to properties and then go to divice manager and see if anything needs updating or when you boot go to last know config

just follow the link and click download and install it. it is latest sound driver for realtek audio.

http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-40480-1&lc=en&dlc=en&cc=us&os=228&product=3201291

if this helped you then please rate for me and thanks for using fixya

Either press the "Reset Button" on machine. hold down the CTRL-ALT-DEL all at once. Remove/Turn Off Power. Or if at desktop from the "START" button and click on the Padlock at bottom and choose it from there. OR press CTRL-ALT-DEL and task manager will pop up... then choose reboot from the Shutdown Tab.

It sound like your DVD/CD+RW has a problem with the read/write head. So u can use some cleaning liquid to clean the head. After cleaning hope it will work on CD. Most of the time DVD are not played or read properly when you eject the disk while in use.

First off was you mouse running like this before the driver update? If so you may need to roll back the driver in device manager. Next go into device manager and choose view>Resources by type>expand the IRQ (Interupt request) and then check all your IRQs that have been set for USB service and see if any of them have been disabled by double-clicking on them and look towards the bottom under device usuage. Let me know if this works. Thanks

delete and reinstall your email software.