Compaq C304nr Bios problems.
This HP Support, the page for Compaq Presario C304NR, and the Manuals page,
http://h10025.www1.hp.com/ewfrf/wc/manualCategory?lc=en&dlc=en&cc=us&product=3245634&lang=en&
Go down to the first download in the list -> HP G3000 Notebook PC and Compaq Presario C300 Notebook PC - Maintenance and Service Guide, and click on it. (HP bought out Compaq.
Compaq Presario C304nr is part of the Compaq Presario C300 Series)
This download states that it's a guide, but in reality it's a Service Manual. It's a PDF file. After you click on the above, it may take up to 30 seconds before you see anything. Most of the time in 10 to 15 seconds, you see the first page. Let it fully download before looking through it.
You can save a copy so that you don't have to download it again, and also so you can burn a copy off to CD disk.
After the PDF file FULLY downloads go up to the top headings. Click on the Floppy Disk icon. It's the second icon from the left. Hovering your mouse cursor on it will briefly reveal, "Click to save this file to your computer or another location"
In the next small window, (Save a copy..), write down the letter/number that is in the -> File name:, box. (It's c00753552.pdf), so you can find it later. It will either be in your My Documents folder, (Start>My Documents), or on your desktop screen. When you see it, double-click on it to open it.
Read starting at Page 87 for Removal and Replacement Preliminaries, first, then go to Page 111 to remove the RTC battery.
I suggest you go to section 2.4 for the Troubleshooting Flowcharts.
(Starts on Page 35)
Have you tried powering it on without the battery in, plugged into AC outlet?
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