The first step in all Portable Projector troubleshooting is to have a known "good" bulb in the projector.
Minor Repair $60 + parts
If the projector will not start correctly or immediately shuts down the problem may be minor, such as a defective power cord, loose connections or plugs, blown fuse or safety switch misalignment. Projectors can overheat because of blocked filters or air flow vents, causing a shut down within a few minutes of starting. Minor repairs do not require major dis-assembly of the unit.
These are the least costly and easiest to fix problems.
Repair or Replace Boards and assemblies from  $90 + parts
Some Power Supplies, processing PC Boards, Fans, Assemblies can be removed and replaced easily.
Major Repair $185+ parts
Replacement and alignment of DMD DLP or LCD chips, optical assemblies, filters, color wheels and light tunnels.
These problems often appear before a lamp fails. The projector displays poor or distorted color. Changing a lamp shows a "brighter" distorted image. These repairs require complete dis-assembly of the unit.
Physical Damage from Dropping or Rough Handling $60 to $185 + parts
These repairs may be relatively minor or require complete dis-assembly and replacement of major components.