Question about HP LaserJet 4L Printer
Printer won't do anything the lights don't even come on.
Your problem most likely is in the switchmode power supply section of the DC Controller board. What typically happens here is that the field effect transistor (FET) which is Q201 will fail. If you are an electronic technician and want to download a service manual, you probably can fix this. I just repaired my Laserjet 4L, and ordered the 2SK1351 transistor from littlediode.com in the UK. I ordered it from them because of the price and the fact that the next best price was 8.88 from MCM Electronics, but they are out of stock until June 21,2010. This FET has switched on and off many times, handled varing amount of current up to 4 amps, and is mounted on a heat sink in the 15 plus years since it was made. It therefore has dealt with a lot of heat, which can make a transistor eventually fail. I hope that this helps!!
Posted on May 25, 2010
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Aug 23, 2012 | HP Deskjet 6980 InkJet Printer
Jul 24, 2012 | Samsung CLP 315 Laser Printer
Jun 07, 2012 | Computers & Internet
Dec 25, 2011 | Canon PIXMA MP150 All-In-One InkJet...
Sep 13, 2011 | Canon PIXMA MP210 Photo All-In-One Printer
Aug 26, 2011 | 1999 GMC Jimmy
Jul 14, 2011 | HP Color LaserJet 2600n Printer
Jun 11, 2011 | Kodak EasyShare M550 Digital Camera
May 05, 2011 | Lexmark X6570 InkJet Printer
May 03, 2011 | Office Equipment & Supplies
625 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: