My screen keeps flicking.. There is a slight humming noise coming from the power pack. The power pack holds a charge without hooking it to my monitor.Once it hooks up to my monitor the screen flicks on and off...Will a regular DC power supply/cord work?

Hum can come from a jillion different places. Is this hum coming from the unit with no speakers connected, or is it heard through the speakers? What sources are being used? What cables? Are thereany common sources of interference near? Troubleshooting is difficult without much information.

Bad transformer?
Copy following link for tips keeping the next power pack running longer, and warranty coverage on Intermatic/Malibu ML200 power pack.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html
Try plugging power pack into extension cord from different outlet,,, but if timer is keeping good time, I suspect the incoming voltage is adequate.
Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

AC hum comes from poor grounding of components.

hi

First of all if you can remove the ram memory DO IT SO ifyou cant try without removing FIRST.

-remove battery pack(if you can romove memory ram aswell) and wait 10 mins
-now start charging laptop without battery pack for 2 mins
-unplUg the power AND press and hold the power button for 45 seconds
-REPLUG THE POWER CABLE BUT DONT PUT THE BATTERY PACK YET

NOW OPEN THE LID WIDER YOU CAN PRESS POWER BUTTON YOU WILL SEE YOUR SYSTEM WILLSTART ONCE YOUR SYSTEM BE READY SHUT IT DOWN PUT THE BATTERY PACK BACK ANDCONTUNUE TO USE YOUR LAPTOP

hi

-remove battery pack(if you can romove memory ram aswell) and wait 10 mins
-now start charging laptop without battery pack for 2 mins
-unplUg the power AND press and hold the power button for 45 seconds
-REPLUG THE POWER CABLE BUT DONT PUT THE BATTERY PACK YET

NOW OPEN THE LID WIDER YOU CAN PRESS POWER BUTTON YOU WILL SEE YOUR SYSTEM WILL START ONCE YOUR SYSTEM BE READY SHUT IT DOWN PUT THE BATTERY PACK BACK AND CONTUNUE TO USE YOUR LAPTOP

I would stop using the adapter immediately. It could be about to blow. When one of these blows, you can get smoke, sparks and fire. You don't want that to happen when you are not around. Further you don't want to have a voltage spike from the adapter to *********** board. You can buy a new adapter at Walmart or whereever. Just be sure that it supports Dell computers. Dell uses a third pin frequently. Check the voltage and amperage of your current adapter. You should see something like 19V and 3 Amps. Make sure that your replacement adapter works within those rages.

You can also buy an exact match from Dell or ebay.

Expect a good Universal adapter that you buy at Walmart to be in the range of 50-100.

The good thing about a universal adapter is that you can use it on another notebook later.

Often over the years the Transformer laminations can loosen, from the on/off rising and collapsing magnetic fields, and then they sorta hum louder. I suspect this is what is going on. Shouldn't be too much of a worry.. keep an eye on it tho.

In a word...yes. Except that you said it is coming from the "screen"? Did you mean the screen on the power supply? If so then yes...probably the fan.

it could be the bearings werent packed enough with grease or it could be the tire making the noise.

it is the voltage reg