8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHsat nav discs - safe ?
Leading reported evidence
Run on the lowest it can get away
Suggestion or failed attempt
No successful repair reported for this finding.
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Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
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Suggestion
Not all disc transports can read (re)writable discs properly, and given that the laser is often variable power (usually running on the lowest it can get away with) - it is plausible that it gets cranked to the max for a prolonged period which could damage it, but I'd think it fairly unlikely.
Leading evidence: 'Run on the lowest it can get away' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run on the lowest it can get away' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Use decent quality-branded media and you'll probably be fine
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
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Suggestion
The bottom line is - use decent quality-branded media and you'll probably be fine.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
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Suggestion
Does it say anything about only using discs emblazened with
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Run on the lowest it can get away
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Not all disc transports can read (re)writable discs properly, and given that the laser is often variable power (usually running on the lowest it can get away with) - it is plausible that it gets cranked to the max for a prolonged period which could damage it, but I'd think it fairly unlikely.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
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Generation: 20261027T044418Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
a guy who i know who is a merc mechanic has 'warned me off' buying aftermarket discs for the sat nav.
he said of the last 20 merc units that failed 19 had copy discs in them. Laser problem apparently which then needs replacing
anyone here had any experience ?
Is he talking rubbish/misinformed ?
are the merc/porsche units that different ?
Assuming the laser/sensor assemblies haven't burnt out from trying to focus on crappy quality discs (which is unlikely, as an optical quality issue just results in a read error and the unit declines to boot from disc), sounds like cobblers.
How could even maliciously written code mess up the laser/lens etc?
I suppose my eyes will go blind if I continue to watch pirated ******.
*bad example - that may actually happen.
Not a focussing issue, but one of sensitivity (or not) to the dyes used in (re)writable CD/DVDs. Not all disc transports can read (re)writable discs properly, and given that the laser is often variable power (usually running on the lowest it can get away with) - it is plausible that it gets cranked to the max for a prolonged period which could damage it, but I'd think it fairly unlikely.
By violating whichever "Rainbow" Book standard the disc transport is expecting to use, and crashing the laser head into positions that it's not designed to go.
Quite possibly... 8)
I would have thought if the media player (CD/DVD drive) was sensitive to the dyes used in recordable discs, the manual would warn against using them (ie music/mp3 copy discs etc). I am not aware it does.
As for the rainbow books, I would have thought any encoding of a disc would not overwrite the laser focusing firmware. If it could that would be a failing of the hardware manufacturer to ensure a hard floor etc to the laser assembly travel. Irrespective of the book colour, disc thickness barely alters.
Even if this was possible, the extra effort to lodge a "virus" on a navigation disc seems like a lot more trouble than your average pirate might make.
Does it say anything about only using discs emblazened with
or
? :chin:
Not the focussing, but the linear tracking (or radial tracking on an early Philips transport) - driving the head off the edge of the disc, as it were.
Indeed, technically possible - but highly unlikely. I'd still say laser failure from prolonged attempts to read non-pressed discs is a possibility, albeit a slim one.
PS: deliberate error - Rainbow Books only apply to CD, not DVD - but you get my drift!
I think with the alleged stats of 19/20 units we're looking more for probables than possibles.
The laser assembly failure due to a copied disc (which by definition is a data clone) seems outlandish at best.
The "data" portion of the disc will be the same, but the inner few (pressed) tracks will differ - so it is possible to differentiate between pressed and burnt discs...
The bottom line is - use decent quality-branded media and you'll probably be fine. YMMV
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