During the splash screen it is running the Power On Self Test or POST. That is where it is detecting the error, and since you already replaced the cheapest component that could cause your error, you are most likely looking at a keyboard replacement, or replacing the motherboard as your worst case scenario.
It is possible that you can buy an extended warranty from Dell, but I am not sure how much that costs. It will be different depending on your laptop. I highly recommend contacting Dell to find out if you are eligible to get a warranty extension, and find out how much it costs if you are.
A new keyboard will probably run you between $20 - $30, and I couldn't guarantee that that would fix your problem. A new motherboard is over $100. The warranty extension is probably going to be closer to $100, but it will guarantee your issues will be fixed and you will have the peace of mind for the extra year.
Perhaps someone here more familiar with the Dell Studio Laptops will be able to chime in though. I'm sorry I couldn't help you get your issue resolved.