|The procedure for trying an external monitor can only produce a display if there's nothing wrong other than the internal display is not producing video. |
"...the manual states that the laptop will function without the battery onboard from ac power only. "
I looked in the manual....
I searched the pdf using: ac adapter,
read the text in the manual where there were "hits" in the text, and I found NO mention where it specifically says the laptop will run without the battery installed.
It does say similar to this in at least two places, but it's not the same as saying it will run without the battery installed...
Check the battery - if you are using a battery to power the computer, the battery may be depleted. Connect the computer to an electrical outlet using the AC adapter and then turn on the computer.
In my experience, if an okay enough battery is depleted to less than a minimal amount, or if it's new and has not been charged yet, or from what I've come across, if the battery is defective such that it can't retain at least a minimal charge, the recent or fairly recent laptop (say, 8 years old or so or less) will not boot or will not fully boot, even when the AC adapter is plugged in.
If the battery can be charged at least the minimal amount, the AC adapter would eventually charge it enough such that the laptop will start up when you press the power button.
That manual also tells you how to check the battery. If you have a Dell battery, not a clone which may not have these features , this should apply....
"Battery charge / health gauge located on the battery..."
"...press and release the status button on the battery charge gauge to illuminate the charge indicator lights. Each light represents approximately 20 percent of the total battery charge. "
to check battery health
"...press and HOLD the status button on the battery charge gauge for at least 3 seconds to illuminate the charge indicator lights. Each light represents degradation."
- no lights - battery is okay, has at least 80% of it's capacity
- 5 lights - less than 60% capacity remains
"The battery is too hot to start charging if the battery light (battery shaped icon) flashes alternately blue and amber."
The battery should NOT get HOT rather than warm, as I said above at the end of Response 2.
If it doesn't get warm at all after the AC adapter has been plugged in for a while, the battery may have an open circuit rather than a short, or some laptop batteries have a chip that may have failed, or an overheat or short switch that may have been tripped or has blown like a fuse. .
The nominal battery voltage is 11.1v . You could test for that with the multimeter or whatever you have, however, I have no idea which contacts you measure between on the battery to measure that, and it's possible the voltage is split into one or more sub units on the contacts, so you may not get 11.1 or higher from any two contacts (the voltage is higher after it has just been charged; the charge voltage has to be higher than the nominal battery voltage in order to charge it.)
If your battery is older than about two years old, assuming your laptop is not damaged, that's the most likely cause of your problems. No laptop batttery is warrantied for more than one year.
If you can find a local place that has the Dell battery or a clone of the Dell battery, you could go there with your laptop and plug it in, and stay there and connect the AC adapter for at least a half hour or so - if that's all that's wrong, your laptop will then start up fine.
If it doesn't start up, then have a laptop repair place analyze it.
Dell™ Vostro™ 1500 and Inspiron™ 1520/1521 Service Manual
Other things you could try - it's possible but unlikely that defective optical drive could cause you problem - see the
directions - pop out the drive and see what happens.
(remove the main battery an AC adapter before you do that)
Apparently, this is the probably the reason you get leds lighting up when one module is installed but not the other one....
"NOTICE - if your computer has only one memory module, install the memory module in the connector named DIMM A" (beneath the keyboard).
- The ATX mboard on modern laptops (less than ten years old or more) is always powered in some places, even when the computer is not running, as long as the main battery is installed and has a charge. You MUST have BOTH the AC adapter and the main battery unplugged when you unplug or plug in the ram (or the hard drive) - did you do that ? If you didn't, you may have damaged the ram, or the ram slot circuit(s) (or the hard drive, or the hard drive connection circuits)
- if the ram is not seated properly, the computer may not boot, and may not beep.
- if a single module is NOT in DIMM A, the computer will probably NOT boot.