Service Manual
Page 15
...Unexpected interrupt in a normal off before turning off. If available, install a working graphics card into a working memory of -day clock stopped Serial or parallel port test failure Failure to decompress code to shadowed memory Math-coprocessor test failure Cache test failure Diagnostic Lights To ...and restart the computer. Reseat any installed graphics cards. If the problem persists, contact Dell. If two or more memory modules are installed, remove the modules, then reinstall one at a time) until you have identified a faulty module or reinstalled all four lights turn off condition ...
...Unexpected interrupt in a normal off before turning off. If available, install a working graphics card into a working memory of -day clock stopped Serial or parallel port test failure Failure to decompress code to shadowed memory Math-coprocessor test failure Cache test failure Diagnostic Lights To ...and restart the computer. Reseat any installed graphics cards. If the problem persists, contact Dell. If two or more memory modules are installed, remove the modules, then reinstall one at a time) until you have identified a faulty module or reinstalled all four lights turn off condition ...