The computer was opened up and using an air compressor, I blew out the dust and dirt. I wiped down as much as I could including the inner and outer case. The inner case has the facsimile autographs of Apple employees. The keyboard and mouse were also thoroughly cleaned. The computer powered up as it should and went to a question mark.This indicates that the computer is not accessing the internal hard drive. The hard drive will have to be replaced or repaired. The 3.5 800k disk drive is working and I was able to get it to read and write a disk. All keys on the keyboard are working properly and the mouse works as well. There are no cracks in the case, keyboard, or mouse. There is no burn in on the screen. The picture that I posted is showing the screen frequency that doesn't match the iPhone photo frequency.. Thus it looks like there is a problem when there is not a problem. The item "Apple Macintosh Mac SE Desktop Computer M5011 1MB Keyboard Mouse 1MB RAM 800K" is in sale since Thursday, January 21, 2021. This item is in the category "Computers/Tablets & Networking\Vintage Computing\Vintage Computers & Mainframes". The seller is "fossilcomputers" and is located in San Jose, California. This item can be shipped to United States, Canada, United Kingdom, Mexico, Germany, Japan, Brazil, France, Australia, Russian federation, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.