HP 4M high pitched noise and burning smell

Last night during a slow print job of PDFs the printer started making (adding) a high pitched noise during the actual printing of pages, and I got a slight whiff of something burning. The pages printed correctly and without any apparent mechanical problem or delay. Any ideas what to look for? Thanks,

Thanks genegold99,
Yea, I'm not too familiar with laserjet products - Inkjet would be the area I'm involved in
I've looked up the LJ 4M troubleshooting page...
http://h20000.www2.hp.com/bizsupport/TechSupport/SupportTaskIndex.jsp?lang=en&cc=us&prodTypeId=18972...
...but I don't see anything specifically related to the issue you've described.
I think the 4M is now discontinued, but if there are any LJ experts out there, feel free to respond with more inputs.
- Ciara
Although I am an HP employee, I am speaking for myself and not for HP.
Twitter: @Ciara_B_HP

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