A common cause of motherboard failure symptoms is bulged or blown capacitors. The top of a blown capacitor will be slightly bent outwards in a convex shape, rather than flat or slightly indented inwards like a working capacitor. But this requires precision soldering. Well, their electrolyte dried up and leaked, so what do you expect? So, you have to check each of the capacitors. In a circuit, the function of a capacitor is to … 2. … But with a bad capacitor, your blower cannot function well and may put your family’s comfort at risk. Here's how to inspect your desktop computer for failed capacitors. Look for the voltage rating on the side of the capacitor. When the motherboard starts overheating, the capacitors present on it will be enlarged than usual. Its capacitor works like a battery and stores the energy needed by the blower to work properly. The effect of a capacitor is known as capacitance. The capacitor is a vital part of your gas furnace system, so it’s important to recognize some of the signs that indicate there might be a problem. It is the first thing you need to do. And I use these computers quite frequently. It stores the extra energy needed to kick the blower into action. A faulty blower will exhibit many signs and symptoms. Fixing a blown capacitor is a simple as swapping out the busted capacitor for a new one. See the photos above for examples. You will need a capacitor tester to test capacitors. Extra energy is required to power the blower, so it's connected to a capacitor that works like a battery. So, don’t be dissuaded from trying it yourself. A quick check of the fuse should be the first step, but if the fuse is good, then the problem lies elsewhere. This is a job that should only be performed by a professional technician who is adequately trained to replace the part. Once of the first signs of a bad capacitor is when the AC unit isn’t blowing out cold … A busted capacitor can be obviously broken (leaking brownish fluid, corroded, or with the leads severed), but sometimes it's subtle. Replacing a bulging or blown capacitor is possible under some conditions. Bad AC Capacitor Symptoms Checklist. Problem Indicators/What You Can Do. Obviously the circuit was designed for approximately the full value, so it isn’t going to work correctly at 1/10 the capacitance. The bad capacitors have a much lower capacitance than their specified value. Weak or bad capacitors can cause both blower motors and condenser fan motors to run slow. Symptoms of bad capacitors If any of the capacitors are bulging or leaking then your motherboard is damaged. If your condenser fan motor is running slow it could be a weak capacitor or a condenser fan motor where the bearings are dragging and the motor is on its way out. A capacitors job is to block dc, allow ac currents to flow and provide filtering. Fault Symptoms Arising from Bad, Leaking or Blown Capacitors The diagnosis for any faulty apparatus will be different in each case. As a problem develops, the cooling system continues to run, albeit poorly, and homeowners may not notice right away. The very first thing we do when someone brings in a desktop computer is check for blown capacitors. I have never encountered a blown or even bulged capacitor on any of these fully functional systems. With a quick visual inspection, we can spot a costly computer repair. Other times, the main bad AC capacitor symptom a person notices is the air conditioner quits altogether. Like a battery, the capacitor stores the extra energy that is needed to “jump start” the furnace blower. A bad or faulty capacitor can exhibit many signs and symptoms. And you can too. These bad AC capacitor symptoms warn you of a cooling system issue. From Wikipedia’s capacitor page: A capacitor is a passive two-terminal electronic component that stores electrical energy in an electric field.