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+5volt stand by short

No on motherboard

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Turns over wont start

Security light lit on the dash ? You say new coil pack , but is there spark ? Are the injectors turning on ? (squirting fuel ) Is there 5volt reference voltage at the sensors that are suppose to have it ? A shorted sensor can bring down the reference circuit in the PCM causing a crank - no start .
The powertrain control module (PCM) can supply 5 volts or 12 volts to the various sensors or switches. This is done through pull-up resistors to the regulated power supplies within the control module. In some cases, even an ordinary shop voltmeter will not give an accurate reading because the resistance is too low. Therefore, a DMM with at least 10 megaohms input impedance is required in order to ensure accurate voltage readings.
The PCM controls the output circuits by controlling the ground or the power feed circuit through the transistors or a device called an output driver module.
The engine coolant temp. sensor , fuel tank pressure sensor , MAP sensor .EGR valve , A/C refrigerant pressure sensor . The TPS sensors an the APP - accelerator pedal position sensors etc.. Any one of these sensors being shorted internally will bring the 5volt ref. circuit down , shutting down the PCM . Find one of these sensors an test for 5volts on the ref. circuit . If less then 5volts disconnect each sensor till you see 5volts on your volt meter .Then replace that sensor.

Nov 09, 2015 | 2005 Chevrolet Malibu

1 Answer

Usb port not working

There are many causes the most usual is over current protection which will stop the 5volt supply to your USB device or a broken connection to the motherboard.

Jan 11, 2014 | Acer Aspire 5733Z-4633

1 Answer

Samsung ln40a530

Check the retifier diode for 5VDC for short. If it is OK, replace the regualtor IC [5VDC], if used.

Mar 01, 2012 | Samsung LN40A530 40 in. LCD TV

1 Answer

I lost the power supply of my linksys nh108, it's a 8 port hub, i want to know what dc voltage do i need.

You will need a 5volt DC Plug power supply.

Hope this helps!
Remember to Thumb me Up lots for all the hard work! :D

Jun 03, 2011 | Computers & Internet

1 Answer

My pc won't power up, I've checked the momentry on/off switch and it's fine. Not sure is it a motherboard problem or the power supply.

Check capacitors (3300 uF-6.3 volt) and power supply +5volt rail.
Lock at:

Dec 10, 2010 | ASUS A7N266-VM Motherboard

1 Answer

Iat sensor voltage 5 volts not 12

Most computer systems operate with 5volt Plus or 5 volts minus. From my experience I don't see a problem. plus or minus voltage gives the computer a range for which to base its data on as a monitoring system. I am not sure what the resistance on the lat sensor is. but if it conducts any ohms at all it should be good. if it conducts nothing at all it is possibly standing open and would be bad. Hope this is helpful.

Sep 24, 2010 | Ford Mustang Cars & Trucks

1 Answer

HP compaq nx9110 BIOS battery/hd not detected

Hi there , if the main battery is removed the cmos battery will go flat , if its a small pcb mounted 1 you can short the contacts for a short time , if the cdrom is working it mains the 5volt supply is ok and you should be able to hear the hard drive spin up unless there is damage to the pins on the hdd or the adaptor or hdd is mounted wrong .

Aug 10, 2008 | HP Compaq Business NX9110 Notebook

1 Answer

EliteGroup GS7610 ULTRA / AMD Athlon 3000 motherboard bundle problems

Which I/O Ports? serial? parallel? Check your devices incase if there was a thunderstorm that might have zapped them. I would check the little tabs on the back faceplate and make sure they're not shorting something.

I would also make sure that the little "stand-offs" or feet (i know there's another word which I can't think off) which are placed between the motherboard and case are matching the motherboard holes so that they're not shorting anything. I would go over them by marking the holes on the case corresponding to where the board will sit and then screw on the "stand-offs"

Brain farts ****

Jun 14, 2008 | Computers & Internet

1 Answer

Sony Projection TV KP-51HW40

thats over current shutdown the +5 line is either overloade or shorted on the A and B boards. You will need to trouble shoot the +5volt line possibly a faulty regulator

Jun 05, 2008 | Sony Grand WEGA KF50WE610 50" Rear...

1 Answer

Biostar M4M70-M4 mounting question

Of course it could make a difference. Any contact between an active voltage on a motherboard and the metal of the case will fry the motherboard and possibly the P/S. There are different sizes of standoffs to fit different cases and motherboards. Sometimes if a person doesn't use a sufficient number of standoffs, one corner or another of the motherboard can be inadvertently bent toward the case ground causing a short. Even the raised mounds you speak of need standoffs of some type if the surface of the raised mound encrouches upon a surface of the motherboard that has voltage on it.

Feb 27, 2008 | Computers & Internet

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