I had the DC power jack repaired on my Armada M700. After reassembling the system I booted up and started out fine. Compaq Logo came up when Laptop made jump to Bios screen went black. I thought perhaps a bad connection no such luck. Hooked up an external monitor to test. Booted up Compaq logo on the LCD, jumps to bios LCD goes black and external monitor took over. Laptop runs fine other than LCD won't come up. Went into bios change settings no luck. Change Video driver no luck. I can't figure out what it is. It isn't mechanical all connections are solid. Has to be in the bios but I flashed updated bios and it still won't work. Anyone overcome this problem in the past? I am stumped.
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Re: LCD Monitor isn't recognized
It is not neccesary to power your system on and off. Removing the battery for the CMOS ( complimentary metal oxide semiconductor ) will reset the BIOS (Basic input/output system) to default settings. There might also be an option within the BIOS to "Load Defaults" if that is all you are looking to do. You can also check your manual to see if you can locate a BIOS reset jumper on your motherboard.
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this usually happens when the computer is trying to boot from a disk that isn't a valid boot disk.
if you have a floppy drive plugged into the multibay and a floppy in the drive, try removing the floppy. if there is no floppy involved, try to boot from your system recovery disks, as it's likely that the boot record on the hard drive will need repaired. your system recovery disks should walk you through the process.
its in neither its a seperate circuit board that connects the screen to the motherboard and its called an inverter
you will need the correct inverter board for your laptop and will need to find the relevant instructions on how to replace / repair it and take care and have lots of patience and persistence as it can be fiddly
There is a DC jack on the inside of the motherboard, It needs a solder touch-up. Chances are good the board has been getting too hot and it cause the solder to tarnish to the point that it is not making a good bond between the board and the jack. A common problem that I fix all to often. But on the M700 I would say that a fix like that would be unrealistic as I have the best prices in town and at $150 it would make the system not worth fixing. Of course as the owner of a computer store I would take it on trade for an upgraded system but not all stores do that. Good luck.
It could be just a coincidence...but lets try a few things...
Remove the battery and unplug from the wall. Hold the power button on...and then plug back into power...after 8 seconds release the power button. Once your computer boots to desktop...shut down...and replace the battery.
Changing the harddrive should have anything to do with teh battery...
See if your battery starts charging after this trick.
Those may have 1 or 2 different problems.
Cold Solder joint on Mobo.
Bad DC Power Jack.
1: if it is the Cold Solder, you can reflow the solder and be done with it.
2: if it is the DC power jack, It should be replaced.
For simplicity lets call them DC(A) and DC(B)
There are 3 connections to it. Gnd, DC (A), and DC (B).
When the powersupply is plugged in, contacts (A) touch to send +DC to the laptop. (B) is open.
When the laptop is using battery power, contacts (B) touch to send power from the battery through the system.
Over a period of time (inserting and removing the DC Power Cord), the contacts become fatigued, or oxidized and the DC(B) never closes - so it won't work from DC Battery.
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Had the same problem with My Compaq M700 No Boot Or Post. Battery Light Flashes 8 Times, Have to Wait 24 to 48 hrs sometimes longer to get Laptop to Start. Tryed the DC Converter Board Change No Difference same Problem. Noticed When Laptop Did Start Clock Time Was always a Little Off 2-4 Hours sometimes more. So Figure CMOS Problem With Time Issues. Read About Battery Memory Transitor Voltage spike Detection Issues Corrected With Newer Bios Flash at HP Supports. So I Flashed Bios With Latest 686h. During the First Boot After Reflash Battery LED Did flash No Start, After pushing the power button again it Started. And has Every since.So Far Laptop Now Boots Everytime and CMOS Checksum Seems To Keep Time Correct In Windows. The Bios Flash Corrects a Voltage Spike Detecting Transistor In The Charging Circuit. During First Start after flash Bios will run system test on the charging system and Correct CMOS. Worked for Me Hope this Helps a Few.