If you mean MVT2090 the manual is on Memorex.com website. Is it a 9" AC/DC made about 2 years ago? There is a new feature on that website, when you get to the front page of the manual you can choose to download it in PDF. That is much more "readable" than the old manuals on the site. Once you have the manual you should be able to narrow it down a little more and if you need more help let me know. John. gulftech@xxxxxxxx wrote: > This set works fine on DC. Won't power up on AC. Can hear high-pitched > squeal from SMPS transformer. > > No schematic, need a schematic of power supply portion, or some ideas, > please. > > TIA, > > > Ken Smith > Gulf Technical Services > 3034 Gulf Breeze Parkway > Gulf Breeze, FL 32563 > 850-934-8324 (Voice) 850-932-0819 (Fax) > > > ________________________________________________________________ > The best thing to hit the internet in years - Juno SpeedBand! > Surf the web up to FIVE TIMES FASTER! > Only $14.95/ month - visit www.juno.com to sign up today! > ***************************************************************************** > Classifieds! Buy or Sell! > http://sell.tech-assist.org > The Tech Address Book: > http://www.tech-assist.org/secure/tip/contact.htm > Add a Repair Tip Here, or Change/Remove your Email Address: > http://www.tech-assist.org/secure/tip/main.htm > Lost Password: > http://www.tech-assist.org and select "Lost your Login Info?". > Email Archives: > //www.freelists.org/archives/techassist/ > -- John Mielke Main TV Longmont,Co 80501 303 776 6955 303 776 0792 fax maintv@xxxxxxxxxxx ***************************************************************************** Classifieds! Buy or Sell! http://sell.tech-assist.org The Tech Address Book: http://www.tech-assist.org/secure/tip/contact.htm Add a Repair Tip Here, or Change/Remove your Email Address: http://www.tech-assist.org/secure/tip/main.htm Lost Password: http://www.tech-assist.org and select "Lost your Login Info?". Email Archives: //www.freelists.org/archives/techassist/