I am having trouble removing hood/motor cover on Epic 550 treadmill. I have removed 4 - 3/4" screws from front panel and 2 - 1/2" screws from underneath. Still feels locked on. Are there other screws to remove somewhere else?

Heidi, There will be quite a bit of disassembly required to remove belt, I have attached your manual, which shows an exploded view showing what has to be removed to access rollers and remove belt. you may get away with dissembling/remove front motor cover,remove rear roller and front roller.
Check the attached links,instruction and guides, Good luck
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http://pdfstream.manualsonline.com/d/de84f386-3308-4d84-a2ed-a52898e55aa5.pdf
Treadmill Walking Belt Installation Video by Treadmill Doctor
How To Remove Replace Treadmill Belt and Deck Green Fitness Company

epic view 550 treadmill video 2 - YouTube

? 2:08
https://www.youtube.com/watch?v=fSIuoh_bZN4
Mar 9, 2010 - Uploaded by Epictreadmillowner
epic view 550 treadmill video 2 ... ICON Canada doesn't really support this and the independant technicians ...Epictreadmillowner 1,181 views.

Epic View 550 Treadmill Review - YouTube

? 3:02
https://www.youtube.com/watch?v=kNiFOcrV9r4
Nov 29, 2012 - Uploaded by Treadmill Review Guru
... .com/epic-treadmill-reviews/epic-view-550-treadmill-reviews-ratings/ ... Nordic track has the track and google maps by i-fit you can download and run anywhere ... The review says it doesn'thave the track/lap but it does.

Epic View 550 Treadmill video 3 - YouTube

? 1:59
https://www.youtube.com/watch?v=YjqgZS-1qlw
Mar 11, 2010 - Uploaded by Epictreadmillowner
Epic View 550 Treadmill video 3. Epictreadmillowner ... I have had 3 different console units, and now the tv doesn't work either!

Epic View 550 Reviews - MyTreadmillReview.com

mytreadmillreview.com/epic-view-550-reviews-2

you must have a Lamp for to help the screws. Unless the machine had not screws, must be adjusted to a pressure. You must use the screwdriver for to help to open the hood.
see the video:

Check this and adjust it:
If the console takesbatteries, replace them. If this does not work or your console does not requirebatteries, check the reed switch or optic sensor. Reed Switch:Unplug the treadmill and remove the motor hood cover. The reed switch is mountedon the frame next to the front roller pulley. There is a magnet glued into thefront roller pulley. When adjusting the reed switch, make sure it is pointingdirectly at the magnet. Move the tip of the reed switch within 1/8" of themagnet. Also, check to see that the wire is not damaged, and is connected tothe console.
Optic Sensor: Unplug the treadmill and remove the motor hood cover. The optic diskand sensor are located either at the end of the motor or the right hand side ofthe front roller. The optic disk spins between two sensors on the optic switch.The disk must spin freely without touching either sensor. The sensors can bemoved by loosening the adjustment bolt holding the switch to its bracket. Theswitch can then be slid. Center the disk.
Good luck. sincerely
E.CUADRA

If the calibration does not pass you may need to check the speed sensoralignment.1) Remove the motor cover hood by loosening the 4 screws that hold it inplace (you do not need toremove them completely).2) The speed sensor is located on the left side of the frame, right nextto the front roller pulley (thepulley will have a belt around it that also goes to the motor). Thespeed sensor is small and blackwith a wire connected to it.3) Make sure the sensor is as close as possible to the pulley withouttouching it. You will see a magneton the face of the pulley; make sure the sensor is aligned with themagnet. There is a screw thatholds the sensor in place that needs to be loosened to adjust thesensor. Re-tighten the screw whenfinished.

If the console takes batteries, replace them. If this does not work or your console does not require batteries, check the reed switch or optic sensor. Reed Switch: Unplug the treadmill and remove the motor hood cover. The reed switch is mounted on the frame next to the front roller pulley. There is a magnet glued into the front roller pulley. When adjusting the reed switch, make sure it is pointing directly at the magnet. Move the tip of the reed switch within 1/8" of the magnet. Also, check to see that the wire is not damaged, and is connected to the console.
Optic Sensor: Unplug the treadmill and remove the motor hood cover. The optic disk and sensor are located either at the end of the motor or the right hand side of the front roller. The optic disk spins between two sensors on the optic switch. The disk must spin freely without touching either sensor. The sensors can be moved by loosening the adjustment bolt holding the switch to its bracket. The switch can then be slid. Center the disk.

Remove the front cover and check to see if the RED led is solid.
4 x screws on the front and two underneath the belt to the sides.

There are 4 screws across the front. The two additional hidden screws are underneath. Lift the walkboard frame up and they will be through the frame where the end of the hood cover is. One on each side.

There are 2 more screws located on the bottom side of the cover. You will need to fold the treadmill down to the ground, console should fold down on top of the walking surface. This will expose 2 holes close to the front roller bottom. These screws are phillips head and need to be removed as well. This will free your cover allowing you to remove it.

There are 3 screws across the back of the cover and then there are 2 more screws located on the bottom side of the cover. You will need to fold the treadmill down to the ground, console should fold down on top of the walking surface. This will expose 2 holes close to the front roller bottom. These screws are phillips head and need to be removed as well. This will free your cover allowing you to remove it.