This is a SAMPO 32" monitor. Came in with no Vertical. There was just a the horizontal. Changed the Vertical driver and this corrected the no vertical. If there is signal input AV1 or AV2 have a normal display, If there is a blue screen indicating no signal there is a retrace displayed on the upper half of the blue display. Any suggestions?? Two SME-23DV3Ns have just been thru repair for HOT failure. (BILL)William Koscielniak AV Electronic Technician St. Lawrence / LRC BOCES 7229 State Highway 56 Norwood, NY 13668 Phone (315) 353-6684 Ext 216 FAX (315) 353-5504 ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/