NMB blower BL4447-04W-B49 Cannot locate exact part. Suffix B49 indicates speed sensing fan, all I can find is fixed speed. I could replace the ball bearings, but that is assuming I can find the small ball bearings NMB L-940ZZ.
An expert who has achieved level 3 by getting 1000 points
An expert that got 20 achievements.
An expert that got 10 achievements.
An expert that got 5 achievements.
System Power... Master
Re: Bad blower (fan) in Astec RS-PSU-450-AC1N
If you cannot find a exact replacement, don't worry, use a fixed speed fan, you only want to keep things cool, you care what speed it runs at as long as it does its job, and it is easier than replacing the bearings
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
I'm afraid you need a user and a service manual. These power supplies, deliver different voltages, but the also sense some or all voltages. If you leave an output without user, it could be the whole supply shuts down. Some knowledge of electronics is a must.
you might have a faulty PSU power supply unit if the units fan is intermittent and your computer restarts at any time you could try plowing all the dust from it using a high pressure air blower from a compressor make absolutely sure there is no moisture in the airlines you will have to open up your computer to blow the dust from your psu and blow the dust from inside to outside through the back of psu while you are inside your computer blow all dust from your computer if you have any problems with this post a reply hope this helps
DO NOT troubleshoot a power supply unless you are professionally trained. Power supplies contain a lethal charge even when disconnected from a power source and should never be opened or tampered with. If you are having a problem with building/upgrading a PC and are using this power supply, then please post further details on your problem here and maybe we can help.
Close examination of your power supply may reveal if the psu is bad.
When the power supply is plug in ac socket the green indicator led inside the motherboard will lit steady green. See if by turning on the cpu you will see some sparks in the power supply connector attached to the motherboard. This is a clear indication of a bad or shorted psu.
You can also smell if there is a burning inside the psu.
See if the fan inside the psu is working if not then its a clear indication of a bad psu.
Using a multimeter if you have one measure the dc voltage coming from the supply connector. Insert the black probe to one of the black wires in the connector. And the red probe to the red wire in the connector. the reading should be +12VDC. Put the red probe to the red wire and it should read +5VDC. Any readings below this, means bad psu.
Measure also the output voltage when there is a load in the power supply. Connect a CD-ROM drive or hardisk and measure again the voltage. Dropping of voltage when put some loads is a clear indication of a bad power supply unit (psu).
I hope this will help you. Thank you for using Fixya!
Your psu is works fine. First open cpu cabinet and find motherbord. Pull CMOS cell from m/b for 10 minutes. Refix RAM Memory. Pull procesor fan and processor clean dust from all parts. Then fix processor fan and processor. Reconnect ATX connector to m/b. Remove pci cards from PCI slot then check. Let me know if you need more assistance. Thanks.