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No POST Precision 4800 Black screen
Hello,
My M4800 does not start: total black screen, but the 3 led sound and the on/off led are on.
It has already happened in the past, I had to try many times and wait for it starts again and the bios update (A26) resolved the problem for several months before the problem came back without understanding why.
I tested a lot of advices here, even removing all parts (RAM, HD, CD drive, battery, CMOS...) but no changes.
Only the D + start test passed (the screen changes colors) but it remains without POST on reboot.
I looked for a bios recovery method, but there wouldn't be one on this model if I understand correctly.
Do you have an idea ?
Thank you very much for your help.
JOcean
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February 14th, 2023 14:00
Is the 3 LED Amber or Green?
cljt
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February 15th, 2023 00:00
Thank you for your reply @JOcean
No, I never saw any other color than off-white color for these LED and they are continue.
JOcean
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February 15th, 2023 05:00
Sorry my mistake as I was thinking desktop Precision and not mobile when you mentioned 3. To be clear the diagnostic LEDs are Power, Storage, and Wireless. Which are lit solid, which are blinking, and which are not on at all? This chart in the manual references what the diagnostic lights indicate.
cljt
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February 17th, 2023 01:00
No problems, thanks for your reply,
All are off except the battery on solid
(see photo).