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When I turn on my V3000 the power and indicator LED's light up but nothing appears on the LCD. I Thought it may have been the integrated Video Card so i bought a new motherboard and installed it, but the issue still remains, even when i hook up an external monitor it wont work. So I tried some new ram, and nothing has changed. This one is really a stumper. I have completely Disassembled the machine and reassembled it making sure to check all of the connections and make sure they are all nice and snug. Any Ideas?

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Following the back-and-forth between and , here is a concise, prioritized diagnostic checklist and a few cautions tailored to a Presario V3000-class laptop that powers up but shows no picture. The goal is to isolate whether the fault is in the display/backlight path, the board power rails/POST, or a connector/hinge failure before committing to a replacement board.

  • Look for a faint image first. With the lid powered on, shine a bright flashlight across the panel at an angle. A ghost image means video is arriving but the backlight (inverter or LED driver) or its supply is dead. No visible image points further upstream (video signal or GPU/power rails).
  • Confirm POST status without relying on the screen: note fan spin, drive activity, and whether keyboard LEDs (Caps/Num Lock) toggle. Presence of activity suggests BIOS/OS is running and the problem is video-specific; total silence points at power/POST failure.
  • Do an EC/BIOS power reset: disconnect AC and battery, hold the power button ~15–30 seconds, then reconnect AC only. Remove the CMOS coin cell briefly if accessible to reset firmware settings.
  • Inspect and test the display flex/hinge wiring. Look for pinched or frayed traces where the cable bends; wiggle the lid while powered (carefully) to reveal intermittent connections. Continuity checks on LVDS/backlight lines will quickly show an open.
  • Voltage checks at test points: use a multimeter to verify the main 3.3V/5V/12V rails and the panel connector voltages (only if comfortable and experienced). Missing or low rails indicate DC-in/regulator faults rather than the panel itself.

If these steps don’t locate the issue, the fault is likely board-level (power regulation or GPU-related). Given the age of V3000 machines, prioritize suppliers who guarantee tested boards and short warranties rather than unverified listings. Observe anti-static precautions and avoid powered probing unless experienced; reflow or board-level rework is a specialist job and not recommended as a first attempt.

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Member Avatar for finito

Aahh yes, You remind me of myself.

I want to Test the LCD on another Machine just to check if it's working.

Then I want you to try another monitor on your current Machine.

Post results thanks.

Member Avatar for Arsenal101

I forgot to mention that i did test another LCD on that machine and it didn't work either. Granted it was not the exact size LCD but it still should have worked.

Member Avatar for finito

Hmm maybe the PSU?

The power supply. If you have a spare lying around try that first,

Member Avatar for Arsenal101

We are both talking about a laptop right? Because i'm pretty sure that the PSU is built into the motherboard. despite having that little connector cord that runs from the jack and plugs into the MB

Member Avatar for finito

I answer a alot of questions in a day so I loose track of whose who. But yeah I though we were talking about a Desktop this whole time. You said you changed the motherboard of a laptop right?

Ok what are the chances that the motherboard you changed with has the same problem? I mean is it new?

Member Avatar for Arsenal101

Yea I changed the motherboard in the laptop. And i Bought the motherboard off eBay. it said it was a completely working motherboard but by the looks of it wasn't new. Theres a chance that it could be the same issue. or i was thinking that it could be the processor? since it does nothing on start up.

Member Avatar for finito

Processor won't have anything to with the graphics.

A laptop follow the same guidelines for a PC. In this case it is usually the board or the graphics card. Or another peripheral that has short circuited.
Look at all the internals to see a burned circuit or look for a burned smell.

Member Avatar for Arsenal101

Everything looks fine. Nothing smells bad or has that burned electronics smell to it.

Member Avatar for finito

Hmm, can you change the processor?

You have admit this may be a lost cause depends on how far you are willing to take it.

Member Avatar for Arsenal101

yea i'm kind of thinking it might be, Its not my computer though and i was almost positive that it was the Integrated Video that went so i had the the person pay for a new mother board at the cost of $115 so i don't want to be like oh btw your computer has completely crapped the bed... If i can find a different processer that fits it i will try to change that.

Member Avatar for finito

Yeah lol, that is a sticky situation. You must understand even if you change the CPU it may not be that.

Member Avatar for Arsenal101

Yes i understand that. I really dot think it is. I think it may be a faulty monitor Cable? i had taken the screen apart to test that other monitor and when i put the old one back in it worked. but then i put the screen all back together it didn't work. so i think it may be a broken wire in the monitor cable. Does that sound like it could be it?

Member Avatar for finito

It could be that, without the Notebook in front of me it could be anything at this point.

Maybe the board, maybe the CPU, maybe the Cable, maybe something else completely.

Member Avatar for Arsenal101

Yea its probably something completely stupid that im just not seeing it

Member Avatar for finito

Yeah and that is where I can't help, try and find a someone over there that you can show it to, try and get a second opinion.

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