2005 Kobelco SK70SR-2 Need advice from a Kobelco expert. Lost boom lift and arm extend.

[CrazyD]

I recently had to replace the instrument cluster as the original died and I could not read any info when I ran my machine. In the process the hydraulic fluid may have gotten pretty low and when I started the machine the boom would not lift nor the arm extend. It would come down and in and now I cannot raise them again. I tried checking the main pump for any air but the fluid was clear. I tried loosening pilot lines to bleed any air from them, but at idle not much pressure and only clear oil leaked out. I did let the machine run for 2-3 hrs hoping if the oil got hot it might work out the problem...but it did not help. I do not have any pressure testing equipment for further testing and have not run the diagnostic menu on the machine. I need advice on what steps to take next. I have not yet able to get a mobile mechanic out to look at it yet. Any good suggestions are welcomed.