Jon,
the image you see on screen and the image that comes out the printer
are often slightly different. Try printing a web page to see if the
effect is the same. If so, it's unlikely there is a problem with the
original image captured by the camera - my next step would be to make
sure you have the most up to date OEM drivers for your laptop and
printer.
Your laptop has an integrated graphics card which uses the Intel 855GM
chipset according to the Dell site.
Latest drivers here
http://downloadfinder.intel.com/scripts-df-external/Product_Filter.asp...roductI
Latest printer drivers here
http://www.epson.com/cgi-bin/Store/support/supDetail.jsp?BV_UseBVCooki...es&oid=
Choose your Operating system, download and install. The chipset driver
will require a restart.
If this doesn't work, go into the display settings in windows. Click
the advanced tab under settings. You may have colour management tools
for the display here depending on how much functionality the chip
driver has.
When printing, click file/print/properties. Check you colour settings
are normal. I.e. colour and tone controls neutral (all set to 0+ or
pointer in the middle of any sliding scale). Check you are not using a
specialist colour mode/scheme i.e. text/adobe RGB. Restore defaults if
you can. When using preset quality modes such as "best photo" you may
find that prints are a lot heavier on black ink which can saturate and
darken the look of finished prints.
Next, browse any printer utilities you have. Some utils also have
colour management tools or fine tuning options.
Lastly the obvious... check the monitor brightness setting, make sure
the ink and cartridges are genuine Epson brand for 760..... buy good
quality photo paper.
bear in mind it may be that the printer just can't match the subtle
tonal rage captured by the camera.
Best of luck
Pete