basics
get a DVM multimeter. I find non-autoranging easier to read without all the jumping around while to try to get the probe on the pin. Take off all your jewelry. Put meter on 200V scale. Look at the IC diagram you can download from datasheetcatalog.com. Figure out which are the power supply pins. Being careful not to short pins to other pins, check the two power supplies. If you go from + supply to - supply, correct answer is sum of the two numbers. Wrong answer, debug the power supply. Common problems are outdated electrolytic capacitors (over 20 years old high quality, over 5 years old generic quality) and bad solder joints. aikenamps.com has some useful basic info on line. For basic debug techniques,like how to use a meter and what the readings mean in transistor circuits, I like the community college text "Electronic Devices, Electron Flow Version" Thomas L. Floyd, Prentice Hall publishing ISBN 0-13-363599-6. I got mine for $2 at a charity resale shop because it is obsolete. Your local community college bookstore might have something just as good. A lot of devices have been invented since I took physics lab in 1969. Good luck.