mike

I just read the manual and it does explain what red LED and 5 beeps is. “Pre-video memory error.” It goes on to say: (1) Reseat the DIMM’s (2) Replace one at a time to isolate faulty module (3) Replace third-party memory with HP (though just make sure they are DDR3L-1600 or 1866 1.35v, etc.) ( https://www.crucial.com/ScanListView?mod...-upgrade-for&urlRequestType=Base&catalogId=10151&...-1&manuFacturer=HP-Compaq&langId=-1&storeId=10151&modelCatId=1301050) (1) Replace system board If the RAM are, in fact, the correct ones and seated properly then it may be the system board.

If you will be working with a wide variety of equipment get both. Imperial is common in North America amd metric pretty well the rest of the world though because of the size of the American market you will find Imperial outside that region.

Hi Jose, As you have said “…wifi network only if it is extremely near to the router ..” it sounds like the antenna is not connected. Check this: How do I remove the wifi card? Let us know how it goes.

I presume you followed Andrew Bookholt’s teardown? MacBook Unibody Model A1342 Upper Case Replacement Why not just replace the keyboard for US$24.99 ? MacBook Unibody (Model A1342) Keyboard

Check BIOS settings for default display. Resetting the System Setup (BIOS) to its Default Settings (1) Reboot the computer. (2) When you see the Dell logo during POST, press the <F2> key to enter the setup screen. (3) On the System Setup screen, click Load Defaults. (4) Confirm to load the defaults.

Alternative answer: You don't mention if the charging light comes on or not nor how long this has been happening. Also, how old is the battery? Has the time of holding a charge decreased gradually or has this been sudden? If gradual and the battery is a few years old then try replacing the battery.

Hi Monica, Could you please rephrase your question? Do you mean modem port, perhaps? There is no modem port - but there is Ethernet, Bluetooth and WiFi. Hope this helps.

Well the external dimensions of the G751JL and G751JY are the same but....? Is there a parts supplier that will take returns if it doesn't fit? Some may be able to help if you send clear photos of your motherboard. I noticed one sight on AliExpress that suggested this. Good luck! Let us know how it goes.

Hi Larry, Do you mean Mouse or Touch Pad? If a mouse just unplug and plug back in again. This should reload the driver. If the TouchPad then uninstall the driver, run something like Ccleaner to clear away any corrupt settings. Reboot and re-install the driver.

Hi Nicole, (1) First you need to download the latest drives but not install. (2) Now completely uninstalled the current driver and run something like Ccleanerto clean up any traces. (3) Reboot and then install the new driver. (4) Why this way? If there is a corrupt setting or the like re-installing, as expalined above, will just perpetuate the problem. (5) Let us know how it goes. *