Hp pavillion dv6000 won't complete power up. Lights flash on then turn off in about 2 secs. No hdd, fans, screen raster at all. Already replaced battery and ac adapter, also removed memory simms, hdd, and applied pressure to various places on laptop... Need ideas!
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DV6000s are laptops and do not have internal power supplies. The power supply is actually on the AC adapter which plugs into your wall. However, if you need to replace something internally here is a link to a tear down video for the DV6000.
You have suffered a motherboard failure, just to be sure you need to check the voltage at the tip of your AC adapter and leave the system battery out of it, Just try to power it on with the adapter. If the same event happens, you will need to either service the motherboard or replace it. Ebay has several MOBO repair services for the HP products, specifically the DV6000 and the DV9000. These have been HP's problem child for a few years.
As others have said, the most common fault with the ZV series is the power socket. However, you mentioned the Lightning Bolt. This indicates that the battery is being charged and it should go out as soon as the battery is fully charged.
If the Lightning Bolt flashes on and off regularly, especially when the power cable is moved, then the socket is at fault and needs replacing.
You can check to see if the battery is receiving a charge by doing the following
1. Right Click the Desktop
2. Click Properties
3. Click the Screen Saver tab
4. Click the Power button
5. Click the Power Meter tab
This will tell you the computer's current power source and whether the battery is charging.
I have replaced several of these sockets on ZV5000s and I'm sure the 6000 will be similar. I would not recommend this job for anyone without technical knowledge, despite some of the websites that say you can do it yourself. You will need to strip the entire laptop down and all but remove the motherboard before the socket can be replaced.
Hopefully the battery is just confused and needs to be reset. Drain the battery down until the system shuts off automatically, then take the battery out of the laptop for two minutes and plug it back in, and connect the AC adapter, let it charge without turning the laptop on, then turn it on and hopefully it should work fine again. If not then you may need to buy another battery. Try again with another AC adapter just in case because you don't want to replace your battery (expensive!)