UNSOLVED
Help Precision 5510 NO POST and cannot start laptop
Hi,
I have Precision 5510. Last week, after it was left to sleep, I can never boot up again.
At first, it was not plugin to power cord, when I try to turn on the laptop, the power button LED just light up white for around 1 second and light off.
Then I tried open laptop and change CMOS battery. Still the same thing.
Next I followed steps to drain electricity by unplug battery and power cord. Pressed power button for 30 seconds, and plugged in power cord and battery. Still the same thing.
Then I tried remove RAM, HD and bluetooth. No luck either.
As I read more, I understand my laptop is in no POST state with power button and LED under mouse pad flash white light every 1-1.5 seconds. This is with power cord and battery plugged. I tried to start the diagnosis mode by pressing and hold and power button. At first you can see keyboard lights on and fan spinning, then it stops after 3-4 seconds, the LCD never turns on.
Does anyone has any suggestions or know what part is broken? Any help is appreciated.
Hi,
Did you find a solution? I got the exact same symptoms on mine after trying to enter Windows 10 Safe mode by constantly pressing F8. No POST, can't reinstall BIOS from usb, no Dell logo just black. Removed CMOS battery also and reseated. Tried removing hardware.
Holding D with power button shows display works and holding M for motherboard testing doesn't give anything either, just has led lights on. Nothing on HDMI output.
Sorry to hear it. Well yeah at this point for me were left with following possibilities if warranty is ended:
- new motherboard from second hand (still rather expensive)
- try to fix it.
As had nothing to lose, started looking into these bios chips (as thought high possibility of this fault due symptoms). Found the right model for me and then came across on ebay that they are selling those pre-programmed with your model bios.
Ordered a chip programmer and one of those pre-programmed chips. Thought if need to reflash it still if need to include my specific model data.
But after resoldering it and it POSTed and all worked fine, left it as it is (also my original id numbers were right, thought they are stored on bios chip?). Updated the bios to newest version and all good again. No clue what happened, but there is a metal plate across the bios chip (fixed with one screw), and perhaps it shorted out some pins there? Seems awful common problem and hope that dell fixes it on newer models or adds secondary chip for these problems.
But for solution if nothing works and have same symptoms, then perhaps before getting a new motherboard its worth a try. You'd need to solder it yourself or ask someone, I managed to do it myself with some experience with soldering and hobby soldering set.
Yeah the easy to get one near the battery connector. Mine had a marking: Winbond 25q128fvsq, which is 128Mbit chip (check if got the right one, as 25Q32FV seems like 32Mbit?).
Great, let know how it goes!
tony.bowman-licor.com
4 Posts
3672
1
Posted October 1st, 2020 08:00
Did the BIOS Chip work for you? We are ordering one for the same symptoms. Precision 5510 power but no post. Display is fine when we press the power button and the D key.
michaelperd
1 Message
1804
0
Posted January 3rd, 2022 08:00
Hi Oscar, where can i order the bios chip?
jojo2050
1 Rookie
•
5 Posts
4464
0
Posted December 11th, 2019 22:00
Can anyone help?