Is the RAM in the iPad replaceable?

My iPad (original) was working great up to about 6 months ago. I began to have crashes of the built-in apps especially Safari, App Store and YouTube. At first the crashes were only occasional. I was in New York state and took my iPad to the Apple Store in Rochester. The "Genius" did a diagnostic and told me that I had been experiencing out of memory errors or so said the log. It was true I looked into the log myself and there were many memory errors. the Genius decided that I should have the IOS reloaded. So She did so with my permission. The result was a day or so of no crashing, but soon it returned. As time went on the crashes became more and more frequent. I tried downloading System Monitor apps. All of them said I was using all of the memory all of the time. Very little free memory even when there were no apps running. I now suspect that the RAM in my iPad of being bad and the iPad is working around it the best it can but there is now almost constant out of memory errors posted. The about three days ago the Cellular access reports No Service and has never recovered even with reboots. I would like to try to replace the RAM if it is possible. I guess there is nothing else I can do. Apple has thrown me to the curb because my warranty and Apple Care have run out and because it is "so old" there is nothing they can do. I am capable of surface mount repair, but I do not know where the RAM is located. Of course if it is in the A4 then I am certainly screwed.