20 Most Recent WYSE X90CW MOBILE THIN CLIENT 2GB4GB FL 6C US (90955131L) Network Terminal Questions & Answers

Turn Off the computer, now as soon as you hit the power button, keep on holding "Alt" key & keep on tapping "F10 key,ie: Alt+F10, it will open the recovery console ,select full factory restore and follow on screen instruction. (Note:this will erase all datas on the computer)

Hope this helps

http://bitsavers.org/pdf/wyse/WY-60/WY-60_Maintenance_Manual.pdf

May see if Dell can provide it to you. https://www.dell.com/support/contents/us/en/04/category/Contact-Information?~ck=mn

Did you try Wyse as the password? https://www.dell.com/support/contents/us/en/04/article/Product-Support/Self-support-Knowledgebase/Dell-Subsidiaries/wyse

http://www.wyse.com/support/authorized-service-centers unless you are a electrician don't risk doing it yourself in case something goes wrong and someone gets injured or worse then http://www.wyse.com/support/warranty-and-RMAs/spares

Its asking for a password