I looked into the manual and did not see any settings for inversion. I think its safe to say it needs service.
Here is the manual to your monitor:
Products purchased in the USA are warranted to be free of defects in material and workmanship for one (1) year from the date of purchase. This warranty is limited to the original retail purchaser.
Should the product fail due to factory defect in material or workmanship, your unit will be repaired or replaced at the sole discretion of Pyle.
To obtain warranty service please send in the defective product. You must include the following items:
- A copy of your sales receipt or other proof of purchase
- A brief letter indicating the problem you are experiencing
- Include in your letter your return address, daytime phone number and R.A. number
- Also include a check or money order for $15.00 for return shipping, handling and insurance
When returning a product to us for warranty service, it must be carefully packed and shipped prepaid to:
Pyle Service Center
1600 63rd Street
Brooklyn, NY 11204
Our obligation under this warranty is limited to the repair or replacement of the defective unit when it is returned to us prepaid. This warranty will be considered void if the unit was tampered with, improperly serviced or subject to misuse, neglect or accidental damage.
ALL MANUALS ARE FREE OF CHARGE PLEASE SEND A SELF ADDRESSED STAMPED ENVELOPE TO THE ADDRESS BELOW, WITH YOUR REQUEST. WE WILL MAIL TO YOU FREE OF CHARGE.
PYLE SERVICE CENTER
1600 63RD STREET
BROOKLYN, NY 11204