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Motor boating on Compaq Presario 1800 Mboard

My Compaq Presario 1800 stopped powering on at all except for a rattling noise on the floppy that happens the same with power supply OR battery. After a full disassembly, I get this same rattling (that sounds very much like "motor boating" as it is commonly referred to in electronics) when I connect the motherboard with just the tiny PCB that holds the power-on button & other Compaq buttons. Does anyone now of such a problem? Basically, I would like to make sure that such a noise is indeeded abnormal in my test configuration (motherboard with just the buttons PCB plugged). I intend to try to debug the power supply (faulty capacitor) and if that fails, maybe buy a spare motherboard. Any comment is welcome.

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Could be the cpu fan?

Posted on Jun 22, 2007

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Posted on Jan 02, 2017

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I have a ge above range spacemaker xl1800 it seems to work fine except their is a rattling noise when its running it sounds like a bad fan or something comeing loose it seems like its comeing from under...
The noise you are hearing is due to the fan. The fan is used to cool the magnetron during cooking, and because this fan is not working the magnetron is overheating and the thermal protector is opening, killing power to the unit. All you need to fix this is a new fan blade. The fan blade(look for part #80) is slipping on the motor shaft ( the noise you are hearing).

GE XL 1800

If the blade is broken then you can buy a new one from---

GE FAN BLADE

Please ask for further clarifications.

A Fixya rating would be appreciated if you find it useful.

Thanks
Rylee

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Floppy drive doesn't work.......not listed on My Computer
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It seems all Compaq laptops are infected by this problem. If you are sure that the AC port and the AC adapter is working? Can you hear the laptop trying to boot? ..e.g. Hard Drive spinning up, Floppy Disk Drive noise, etc.. if so ...Try hooking up a external monitor.. Does it smell like anything has burnt? (Call for service) Is there anything that sounds loose when you shake it? (Call for service or you can to open it?) Try booting your laptop from a bootable floppy if you have one. Or use Compaq's Recovery CD. But I doubt if you use recovery CD, you might lose data on your HDD. Which O.S. are you using? The Boot-up mechanism checks all the hardware before starting Windows. Some times floppy drive doesn't allow the laptop to boot further by either not responding or sending wrong signal.

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